Longest caves in Thailand

The longest caves list is updated to 20 March 2025. It has all the caves that have been surveyed to a length of over 1,000m.
 


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No. Name Province Length Surveyors Date
1 Tham Phra Wang Daeng Phitsanulok 13,789m RFD/SMCC/OCC 1997-2004
2 Tham Lom-Tham Nam System Chiang Mai 13,541m SpeleoDAO expeditions 2015-2020
3 Tham Mae Lana Mae Hong Son 12,720m Australian expeditions 1986-1992
4 Tham Luang Nang Non Chiang Rai 11,345m CRCC/CMRCA/MCRA/SMCC/BEC 2014-2024
5 Tham Yai Nam Nao Phetchabun 10,597m SMCC 2004-2014
6 Tham Nam Lang Mae Hong Son 8,950m Australian expeditions/D. Smart 1986-1993
7 Long Snake System Mae Hong Son 8,654m Australian expeditions/NEUA expeditions 1990/2024
8 Tham Takobi Tak 7,346m SMCC 2000-2003
9 Tham Krachaeng Yala 5,633m L. Price 1993-2000
10 Tham Nam Wang Si Thamma Sokarat Nakhon Si Thammarat 5,400m P. Ashwell 2011-2014
11 Tham Chiang Dao Chiang Mai 5,342m APS/SpeleoDAO/CDG 1985/2016-2023
12 Tham Pha Phueng Nan 5,180m SMCC 2005-2023
13 Tham Ban Nam Mut Kanchanaburi 4,461m CSCA 1992
14 Tham Pha Daeng Chiang Mai 4,250m SMCC/CMRCA 2013-2024
15 Tham Khang Khao Phitsanulok 4,172m RFD/CSS/SMCC/OCC 2003-2023
16 Tham Pha Mon Mae Hong Son 4,050m APS 1985
17 Tham Le Stegodon Satun/Trang 3,389m DMR 2017
18 Tham Tukkatan Chiang Mai 3,160m CMRCA 2021
19 Tham Sua/Tham Lom Mae Hong Son 3,075m D. Smart 1993
20 Tham Phra Sai Ngam Phitsanulok 3,026m RFD/CSS/SMCC 1997-2018
21 Tham La-ong Nan 2,969m SMCC 2019
22 Tham Nam Mut Kanchanaburi 2,938m CSCA 1992
23 Tham Phu Khieo Chaiyaphum 2,866m British expedition 1989
24 Tham Din Phieng Nong Khai 2,750m Clubul de Speologie "Z" 2024-25
25 Tham Nam Tok Kanchanaburi 2,710m CSS 1996
26 Tham Susa Mae Hong Son 2,646m Australian expeditions 1992
27 Tham Huai Lao Pu Tak 2,625m SMCC 2002
28 Tham Sao Hin Kanchanaburi 2,525m Australian expeditions/Expedition Khao Phuthong Khao Thakhanun 1990/2024
29 Tham Maa/Tham Yang Nan 2,371m SMCC/BEC 2016-2018
30 Tham Nok Nang En Kanchanaburi 2,340m GSSS 1988
31 Tham Lumphini Suan Hin Saraburi 2,245m TCKG/DMR 1998/2023
32 Tham Pha Daeng Chiang Mai 2,190m APS 1985
33 Tham Nam Dan Phitsanulok 2,137m RFD/CSS/SMCC/OCC 2002-2004
34 Tham Plup Pla Ta Yom Surat Thani 2,110m Thailand International Caving Expedition 2020
35 Tham Thewada Krabi 2,018m SMCC 2013
36 Cave NA0122/NA0135 Nan 1,929m SMCC 2014
37 Tham Than Nam Lot Yai Chumphon 1,915m DMR 2021
38 Tham Ki Mi Chiang Mai 1,913m Alpinistyczny Klub Eksploracyjny w Sopocie 1987
39 Tham Gloua Mae Hong Son 1,908m NUEA expeditions 2025
40 Tham Than Lot Tak 1,877m RFD/OCC 1998
41 Tham Ya Wua Yai/Tham Phet Phang Nga 1,876m APS/RFD 1987
42 Tham To Wang Satun 1,850m Ko Tao Divers 2023-24
43 Tham Hued/Tham Christmas Mae Hong Son 1,840m APS/M. Foakes 1988/1998
44 Tham Sila Tiab Surat Thani 1,825m Thailand International Caving Expedition 2020
45 Tham Huai Tong Thai Kanchanaburi 1,819m RFD/CSS/CSCA/TVCC 2004
46 Tham Phu Pha Phet Phattalung 1,810m RFD/Chulalongkorn Univeristy 2002/2020
47 Tham Pha Daeng (MH0099) Mae Hong Son 1,806m APS/Australian expeditions 1986
48 Tham Mae Pla Ao Chiang Mai 1,762m Thailand Karst Hydrologic Survey/V. Zeitoun et al. 1984-2008
49 Tham Pakarang Mae Hong Son 1,741m MCRO/Australian expeditions 1988-90/2019
50 Tham Hong Nakhon Si Thammarat 1,730m P. Ashwell 2012-14
51 Tham Tab Tao Chiang Mai 1,685m SMCC 2003
52 Tham Lod Mae Hong Son 1,666m Australian expeditions 1983
53 Tham Luang Cha Krabi 1,657m D. Rateau & R. Bell 2025
54 Tham Pang Kham Mae Hong Son 1,643m Unknown surveyor Unknown date
55 Tham Huai Chi Laeng Chaiyaphum 1,602m British expedition 1989
56 Tham Pha Ngam Lampang 1,578m SMCC 2009-2012
57 Tham Lek Lek Krabi 1,535m Krabi Family Expedition 2016-2020
58 Tham Racha Phuttha Phang Nga 1,504m SMCC 2010-2012
59 Tham Mae Usu Tak 1,495m SMCC 2003
60 Tham Sai Thong Chiang Rai 1,458m MCRO/SMCC 2019-2022
61 Tham Wang Mu Trang 1,422m SMCC 2024
62 Tham Wiang Fah Chiang Mai 1,414m CMRCA 2020
63 Tham Ruea Phitsanulok 1,408m RFD/OCC 2003
64 Tham Nam Tok Mae Hong Son 1,405m Australian expeditions 1986
65 Tham Duean/Tham Dao Phitsanulok 1,382m RFD/CSS 1997
66 Tham Nam Phra Tat Kanchanaburi 1,332m NZSS 1992
67 Tham Phaya Nakharat Khon Kaen 1,331m DMR 2023-2024
68 Tham Pha Daeng (MH0066) Mae Hong Son 1,323m Australian expeditions 1988
69 Tham Phaya Naak Phetchabun 1,285m SMCC 2003-2006
70 Tham Hub Pha Khao Chiang Mai 1,254m SMCC/CMRCA 2020
71 Tham Tapan Phang Nga 1,250m Australian expeditions 1986
72 Tham Pha Kaeo Phitsanulok 1,217m RFD/OCC 2004
73 Tham Nam Hu Mae Hong Son 1,201m Pang Ma Pha Cave Project 1999
74 Tham Seri Thai Sakon Nakhon 1,157m Clubul de Speologie "Z" 2023-24
75 Tham Pha Phuek Mae Hong Son 1,152m NUEA expeditions 2024-2025
76 Tham Phung Chang Phang Nga 1,150m APS 1988
77 Tham Mor Tak 1,135m RFD 1999
78 Tham Pla Surat Thani 1,103m BEC 1998
79 Tham Chao Ram Sukhothai 1,091m RFD/CSS 1996-1997
80 Tham Krata Lamphun 1,057m BEC 2001
= Tham Yai Nakarat/Tham Kai Phisanulok 1,057m SMCC 2019
81 Tham Khun Huai Tum Lek Phitsanulok 1,035m SMCC 2004
82 Tham Nong Lai Surat Thani 1,032m Thailand International Caving Expedition 2020
83 Tham Pha Thai Lampang 1,025m CMRCA 2020
84 Tham Yai Kanchanaburi 1,021m GSSS 1988
85 Tham Mae Usa Tak 1,019m SMCC 2003