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2026

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2027

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2028

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Who is travelling?

Who is travelling?

AdultsAges 18 or above

2

ChildrenUnder 18

0
From
$3,799
US $2,849 per person

Epic Southeast Asia: River Cruises & Karst Mountains

40 days
From Bangkok to Ko Tao
5.0
14 traveler reviews
From
$3,799
-25%
US $2,849 per person

Price based on Cheapest Room

Price based on Shared Room

Price based on Private Single Room

Price based on Private Double Room

Select Date

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2026

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

2027

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

2028

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1 Adult2 Adults, 1 Child2 Children

Who is travelling?

AdultsAges 18 or above

2

ChildrenUnder 18

0
Save and compare this adventure

Best price guarantee Learn More

Plan your adventure:
Explorer
Curated to ignite your sense of adventure
Fully Guided
An experienced guide will be with you for the entire tour
Medium Intensity
Travelers should be comfortable with somewhat-demanding activities
Guided in English
Group Size 10 - 18
Ages 18-39
Image of a map showing the route of the tour

Highlights

  • Explore Angkor Wat at sunrise
  • Savor local Khmer meals
  • Relax on Koh Rong's private beaches
  • Discover Phnom Penh's street food
  • Cruise the Mekong to a homestay

Itinerary

View Full Itinerary
  1. Introduction
  1. Day 1 Bangkok
  2. Day 2 Bangkok/Siem Reap (1B)
  3. Day 3 Siem Reap (1B, 1L)
  4. Day 4 Siem Reap/Phnom Penh (1B)
  5. Day 5 Phnom Penh (1B)
  6. Day 6 Phnom Penh/Koh Rong (1B)
  7. Day 7 Koh Rong
  8. Day 8 Chambok Homestay (1D)
  9. Day 9 Chambok Homestay/Ho Chi Minh City (1B)
  10. Day 10 Ho Chi Minh City/Nha Trang (1B)
  11. Day 11 Nha Trang
  12. Day 12 Nha Trang/Da Nang (1B)
  13. Day 13 Da Nang/Hoi An
  14. Day 14 Hoi An (1B, 1L)
  15. Day 15 Hoi An/Huế (1B)
  16. Day 16 Huế/Phong Nha (1B)
  17. Day 17 Phong Nha/Hanoi (1B)
  18. Day 18 Hanoi/Ha Long (1B, 1L)
  19. Day 19 Hạ Long Bay/Hanoi (1B)
  20. Day 20 Hanoi/Vientiane (1B)
  21. Day 21 Vientiane/Vang Vieng (1B)
  22. Day 22 Vang Vieng (1B)
  23. Day 23 Vang Vieng/Luang Prabang (1B)
  24. Day 24 Luang Prabang (1B)
  25. Day 25 Luang Prabang/Pak Beng (1B, 1D)
  26. Day 26 Pak Beng/Chiang Khong (1B, 1L)
  27. Day 27 Chiang Khong/Chiang Mai
  28. Day 28 Chiang Mai
  29. Day 29 Chiang Mai/Ban Mae Jok (1B, 1L, 1D)
  30. Day 30 Ban Mae Jok/Pa Khao Lam (1B, 1L, 1D)
  31. Day 31 Pa Khao Lam/Chiang Mai (1B, 1L)
  32. Day 32 Chiang Mai/Bangkok (1B)
  33. Day 33 Bangkok
  34. Day 34 Bangkok/Surat Thani (1B)
  35. Day 35 Surat Thani/Khao Sok (1B, 1L)
  36. Day 36 Khao Sok/Koh Pha Ngan (1B)
  37. Day 37 Koh Pha Ngan
  38. Day 38 Koh Pha Ngan/Koh Tao (1L)
  39. Day 39 Koh Tao (1B)
  40. Day 40 Koh Tao (1B)
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What's Included

Expand All
  • Accommodation
  • Guide
  • Meals
  • Additional Services
  • Transport
  • Free eSIM
    TourRadar offers the lead traveler (the person who booked) a free 1GB eSIM for the trip. The eSIM is redeemable only through the TourRadar app 72 hours before departure.

What's Not Included

  • Flights
  • Insurance
  • Optional
  • Additional Services

Where You'll Stay

All accommodations are subject to change

Operated by

G Adventures

Number of tours

1,050

Age Range

12 to 90 years old

Response time

2 hours

Response rate

84%

G Adventures gives you the opportunity to explore interesting and unusual...

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Sustainability Initiatives

Animal Welfare

Supporting Destinations

Sustainability Programs

Your Peace of Mind Options

Cancellation Policy

A transparent overview of applicable fees.

Travel Insurance

Be covered for any unforseen circumstances.

Customer Reviews

  • Most Recent
  • Most Popular
  • Highest First
  • Lowest First
  • A
    · September 9th, 2025
    I had a very positive experience, I enjoyed the whole trip and would recommend it to everyone who would be interested in this kind of travel.
    Show more
    Trip date: July 2025
    Review collected by G Adventures
  • A
    · August 25th, 2025
    My overall experience of my first G Adventure tour couldn’t have been any better! It lived up to the expectations recommended by friends and family. It’s the perfect way to travel and meet new, like minded people. The itinerary exceeded expectations.
    Show more
    Trip date: October 2025
    Review collected by G Adventures
  • A
    · October 25th, 2025
    Fast paced, exciting and memorable. You got to hit so many highlights in a short period of time. Overall, I wouldnt call this a relaxing trip, but it was full of history and culture. A great way to see and learn a lot in a short period of time.
    Show more
    Trip date: August 2025
    Review collected by G Adventures
  • A
    · October 20th, 2025
    The people, the places, the activities, the food, all 10/10. Had the time of my life and wish I could do it all over again.
    Show more
    Trip date: July 2025
    Review collected by G Adventures
  • A
    · October 21st, 2025
    The trip was a unique way to experience as much as possible in that short time - meeting new people and explore the world together was my personal highlight.
    Show more
    Trip date: October 2025
    Review collected by G Adventures
  • A
    · May 9th, 2025
    It was an incredible experience that is so hard to put into words. I conquered my fear of water, learnt to love spicy food, made 37 incredible new friends and experienced so many amazing cultures in cities and in rural home stays.
    Show more
    Trip date: July 2025
    Review collected by G Adventures
  • A
    · August 22nd, 2025
    The trip of a lifetime. I would travel with g adventure again!
    Show more
    Trip date: July 2025
    Review collected by G Adventures
  • A
    · March 11th, 2025
    Fantastic experience with wonderful guides, locations, and activities. It's a pleasure meeting like minded people on these group tours and making new life long friends
    Show more
    Trip date: September 2025
    Review collected by G Adventures
  • A
    · September 11th, 2025
    Great trip
    Show more
    Trip date: September 2025
    Review collected by G Adventures
  • A
    · October 10th, 2025
    I have absolutely loved my experience and I wouldn’t change the experience for the world. I’ve made friends for life out of all the groups that I was part of and if it wasn’t for them and my tour guides I wouldn’t have had the same experience
    Show more
    Trip date: August 2025
    Review collected by G Adventures

Dates & Availability

Select departure month and travellers

Select Date

Select departure month

2026

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

2027

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

2028

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1 Adult2 Adults, 1 Child2 Children

Who is travelling?

AdultsAges 18 or above

2

ChildrenUnder 18

0
Upcoming departures
Hurry, deals only available for a limited time!
Ends on 4 Feb, 2026
  • From Tuesday
    3 Feb, 2026
    To Saturday
    14 Mar, 2026
    This departure date is not available or sold out
    Sold out
    From:
    US $4,199 per person
  • From Sunday
    8 Feb, 2026
    To Thursday
    19 Mar, 2026
    This departure date is not available or sold out
    Sold out
    From:
    US $4,199 per person
  • From Thursday
    12 Feb, 2026
    To Monday
    23 Mar, 2026
    This departure date is not available or sold out
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    From:
    US $4,199 per person
  • From Sunday
    15 Feb, 2026
    To Thursday
    26 Mar, 2026
    This departure date is not available or sold out
    Sold out
    From:
    US $4,199 per person
  • From Sunday
    1 Mar, 2026
    To Thursday
    9 Apr, 2026
    This departure date is not available or sold out
    Sold out
    From:
    US $3,949 per person
  • 4 Other Unavailable Departures
  • Instant Confirmation
    -25%
    From Tuesday
    3 Mar, 2026
    To Saturday
    11 Apr, 2026
    English
    Almost Sold Out
    This departure date is available and will 100% depart
    Guaranteed departure
    From:
    $3,949
    US $2,962 per person
  • From Sunday
    8 Mar, 2026
    To Thursday
    16 Apr, 2026
    This departure date is not available or sold out
    Sold out
    From:
    US $3,949 per person
  • From Tuesday
    10 Mar, 2026
    To Saturday
    18 Apr, 2026
    This departure date is not available or sold out
    Sold out
    From:
    US $3,949 per person
  • 1 Other Unavailable Departure
  • Instant Confirmation
    -25%
    From Sunday
    22 Mar, 2026
    To Thursday
    30 Apr, 2026
    English
    Almost Sold Out
    This departure date is available and will 100% depart
    Guaranteed departure
    From:
    $3,949
    US $2,962 per person
  • From Sunday
    5 Apr, 2026
    To Thursday
    14 May, 2026
    This departure date is not available or sold out
    Sold out
    From:
    US $3,799 per person
  • Instant Confirmation
    -25%
    From Sunday
    19 Apr, 2026
    To Thursday
    28 May, 2026
    English
    Almost Sold Out
    This departure date is available and will 100% depart
    Guaranteed departure
    From:
    $3,799
    US $2,849 per person
  • Instant Confirmation
    -25%
    From Tuesday
    5 May, 2026
    To Saturday
    13 Jun, 2026
    English
    This departure date is available and will 100% depart
    Guaranteed departure
    From:
    $3,799
    US $2,849 per person
  • Instant Confirmation
    -25%
    From Sunday
    10 May, 2026
    To Thursday
    18 Jun, 2026
    English
    Almost Sold Out
    This departure date is available and will 100% depart
    Guaranteed departure
    From:
    $3,799
    US $2,849 per person
Want to read it later?

Download this tour’s PDF brochure and start tour planning offline

Why book with TourRadar?

    • Trusted and vetted operators
    • Rated excellent on
    • Best price guarantee
    • 24/7 customer support
    • Earn $50 in travel credits
    • Free eSim with every purchase

    To protect your payment and ensure your booking will be processed in United States, never transfer or communicate outside of the TourRadar website or app.

More benefits

What our customers ask about this tour

The content in our FAQ section is subject to change.
All questions
  • S

    Shirley

    Asked on November 3rd, 2025

    i am interested on this tour - traveling solo possible a friend would join, couple questions - either party are both in great condition but age are 52, is there an alternative to this tour in case i am not able to join due to the age - is there additional discount in case i purchase additional tours to prolong my travel? In case i ended up traveling by myself and join a tour would be possible to get pair with someone else so there would not be an additional supplement and is there is someone to help me pair different tours

    Age Range
    Price / Availability
    Single supplement
    Tour Details
    • G AdventuresOperatorWritten November 2025

      Unfortunately, travelers need to be between the ages of 18 and 39 in order to participate in Epic Southeast Asia: River Cruises & Karst Mountains. We would recommend that you look at our Southeast Asia Encompassed tour since it has no age restriction, and it is our longest tour we offer for all ages. If you book 3 or more tours at the same time, you will get a 5% discount on each tour that is not already on sale. Should you and a friend book, you can select each other as roommates. Should they not book with you, and you do not wish to add the single supplement, you will be paired with another solo same-gendered traveler.

  • S

    Susan

    Asked on May 28th, 2025

    Are your age restrictions insurmountable?

    Age Range
    Tour Details
    • G AdventuresOperatorWritten May 2025

      Yes the age restrictions are strict, however there is a similar tour that we offer called the Southeast Asia Encompassed - this is open to all ages.

  • I

    Issaurat

    Asked on March 23rd, 2025

    What are the visa requirements?

    Visa
    • G AdventuresOperatorWritten March 2025

      Visa requirements vary by country. Please check the latest guidelines well in advance of travel.

  • B

    Benjamin

    Asked on March 17th, 2025

    I'm interested In your 40 day tour and I'm wanting to book it. But I'm having trouble with my ear at the moment. My Dr has said it might be better to push back the date I'm interested in. But tbh I'm wanting to go then. I'm wondering if I have to push the date back of that's at all possible.

    Tour Details
    Travel Support
    • G AdventuresOperatorWritten March 2025

      You can amend your tour date up to 31 days before departure, however the new date that you choose will be subject to availability.

  • C

    Cathy

    Asked on January 8th, 2025

    Is the tour guaranteed to depart if I book?

    Tour Details
    • G AdventuresOperatorWritten January 2025

      We operate guaranteed departures so as long as one person is confirmed on a departure, it will be going ahead as planned.

    • C

      Cathy

      TravelerWritten January 2025

      Is it better to arrive a day before the tour starts or on the same day?

    • G AdventuresOperatorWritten January 2025

      You can arrive on the day of the tour, or the day before, and we can add on pre-tour accommodation also if needed.

    • C
      2 more answers
  • A

    Alice

    Asked on November 29th, 2024

    My girlfriend and I are keen on joining the 40 day tour of South East Asia. We are wondering if there is a possibility of us being put in a private room together and what the extra cost would be. Also once finishing are you left in Ko Tao? We are hoping to fly back to the UK from Phuket on 26th/27th June. Do you know of the best transport to get there?

    Accommodation
    Flights / Transfers
    • G AdventuresOperatorWritten November 2024

      Unfortunately we do not have the option to offer private rooms in many of the stops, so it would be in same gender multi share for those nights. We offer an add on of 'Bangkok Express: Ko Tao to Bangkok', so you could easily get back to Bangkok to fly back to the UK from there.

  • N

    Niek

    Asked on October 7th, 2024

    What kind of accommodations can I expect?

    Accommodation
    • G AdventuresOperatorWritten October 2024

      Accommodations can vary and may include hotels, hostels, or homestays with multi-share options.

  • G

    Grace

    Asked on September 29th, 2024

    Is it possible to board in Luang Prabang and continue to the end

    Tour Details
    Transport
    • G AdventuresOperatorWritten September 2024

      We have a tour that starts in Vientiane and ends in Bangkok called Laos to Northern Thailand: Treks & Trails. This tour is only available for travellers aged 18-39.

  • M

    Mouglimed

    Asked on August 20th, 2024

    Can I get a discount if the tour price drops after booking?

    Price / Availability
    • G AdventuresOperatorWritten August 2024

      If the tour price drops after your booking, you may need to rebook to take advantage of a lower price, subject to certain conditions.

  • S

    Sven

    Asked on July 2nd, 2024

    Are there any group size restrictions for the tour?

    Group size
    • G AdventuresOperatorWritten July 2024

      The tour is designed to accommodate a certain group size to ensure an enjoyable experience, but feel free to inquire about specific group size limits.

Can’t find the answer to your question?
Reach out to the experts at G Adventures with your enquiry, they usually respond in less than 2 hours.
From
$3,799
-25%
US $2,849 per person

Price based on Cheapest Room

Price based on Shared Room

Price based on Private Single Room

Price based on Private Double Room

Select Date

Select departure month

2026

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

2027

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

2028

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1 Adult2 Adults, 1 Child2 Children

Who is travelling?

AdultsAges 18 or above

2

ChildrenUnder 18

0
Save and compare this adventure

Best price guarantee Learn More

Plan your adventure:

Good to Know

Tour ID: 5557

  • Currencies
    Riel
    Cambodia
    Kip
    Laos
    ฿
    Baht
    Thailand
    Dong
    Vietnam
  • Plugs & Adapters

    As a traveler from USA, Canada, Australia, New Zealand, South Africa you will need an adaptor for type G.

    Type G
    Vietnam
  • Vaccines
    • These are only indications, so please visit your doctor before you travel to be 100% sure.
    • Typhoid - Recommended for Cambodia.Laos.Thailand.Vietnam. Ideally 2 weeks before travel.
    • Hepatitis A - Recommended for Cambodia.Laos.Thailand.Vietnam. Ideally 2 weeks before travel.
    • Cholera - Recommended for Cambodia.Laos.Thailand.Vietnam. Ideally 2 weeks before travel.
    • Tuberculosis - Recommended for Cambodia.Laos.Thailand.Vietnam. Ideally 3 months before travel.
    • Hepatitis B - Recommended for Cambodia.Laos.Thailand.Vietnam. Ideally 2 months before travel.
    • Rabies - Recommended for Cambodia.Vietnam. Ideally 1 month before travel.
    • Yellow fever - Certificate of vaccination required if arriving from an area with a risk of yellow fever transmission for Cambodia.Laos.Thailand.Vietnam. Ideally 10 days before travel.
    • Japanese B encephalitis - Recommended for Cambodia.Laos.Thailand.Vietnam. Ideally 1 month before travel.
  • Visa
    • Unfortunately we cannot offer you a visa application service. Whether you need a visa or not depends on your nationality and where you wish to travel. Assuming your home country does not have a visa agreement with the country you're planning to visit, you will need to apply for a visa in advance of your scheduled departure.
    • Here is an indication for which countries you might need a visa. Please contact the local embassy for help applying for visas to these places.
  • Payment information
    • For any tour departing before March 15th, 2026 a full payment is necessary. For tours departing after March 15th, 2026, a minimum payment of 20% is required to confirm your booking with G Adventures. The final payment will be automatically charged to your credit card on the designated due date. The final payment of the remaining balance is required at least 45 days prior to the departure date of your tour. TourRadar never charges you a booking fee and will charge you in the stated currency.
    • Some departure dates and prices may vary and G Adventures will contact you with any discrepancies before your booking is confirmed.
    • The following cards are accepted for "G Adventures" tours: Visa, Maestro, Mastercard, American Express or PayPal. TourRadar does NOT charge you an extra fee for using any of these payment methods.
  • Cancellation Policy
  • Accessibility
    Some tours are not suitable for mobility-restricted traveler, however, some operators may be able to accommodate special requests. For any enquiries, you can contact our customer support team, who are ready and waiting to help you.

Videos

  • South East Asia
  • Why Travel With G Adventures?
South East Asia

Who is travelling?

AdultsAges 18 or above

2

ChildrenUnder 18

0

Select departure month

2026

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

2027

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

2028

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec