About
Changklang Trail - 18K is a 17.6 km trail race with 1,054m elevation gain in Thailand. Rated moderate difficulty. Located near Chang Klang, Nakhon Si Thammarat.
Organized byNot specified
Difficulty
Not part of any indexed race series.
Moderate28 KE
KM-Effort = distance (km) +elevation gain (m)100
Based on the ITRA standard.
Elevation Density60 m/km · Very Hard
Elevation Density =elevation gain (m)distance (km)
Time limit:7h
Run Conditions
Weather in Sep
Temperature
23 – 29°C
Warm
Humidity
Extreme
Rainfall
391 mm
Monsoon
Sunshine
7.9h/day
~27 rainy days expected
Registration
Deadline
Aug 6, 2026
Entry fee
Early Bird – 1,500 THB(~$46)until Jul 31, 2026
Regular – 1,700 THB(~$52)until Aug 6, 2026
Travel & Logistics
VenueGreenspace Living, หมู่ 14 น้ำตกท่าแพ ตำบลช้างกลาง อำเภอช้างกลาง นครศรีธรรมราช 80250
Google MapsView on Maps
Nearest airports
NST - Nakhon Si Thammarat Airport61 km | ~1h05 driving time
KBV - Krabi International Airport104 km | ~1h44 driving time
Race Day Info
GPX File
Not yet released, check again closer to race date
BiB Collection
Not available — check the website for more details
Mandatory Gear
Not available — check the website for more details
Other Distances
Community
Reviews
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Race data is actively being refined. If something looks off, .
Sources: eventrunning · Enriched 2026-07-17