CHIANG DAO 100 Ultra Trail 2026

CHIANG DAO 100 Ultra Trail 2026 Presented by DECATHLON returns for its second edition on 19-20 December, using Ban Mae Na School in Chiang Dao as the start and finish hub. Current official artwork carries UTMB Index and ITRA National League 2026 branding, and the longer races are listed with ITRA and UTMB Index classifications. The event is organised by Five Sports Creator and Mae Khanin Club in the mountainous Chiang Dao district of northern Thailand.

The programme has five marketed race classes: CD10, CD20, CD30, CD50 and CD100. Their measured 2026 course distances are approximately 12.4 km, 20.37 km, 36.4 km, 53.17 km and 103.8 km. The headline 100K course has about 5,046 metres of climbing and a 32-hour limit, with a mix of single track, double track and concrete sections. The 53.17K route has about 3,009 metres of ascent and a 15-hour limit; the 36.4K route has about 2,000 metres and a 9-hour limit; the 20.37K route has about 940 metres and a 6-hour limit; and the 12.4K route has about 424 metres and a 4-hour limit.

Race starts are spread across the weekend. CD100 starts at 05:00 and CD50 at 06:00 on Saturday 19 December. On Sunday 20 December, CD30 starts at 05:00, CD20 at 06:00 and CD10 at 07:00. The current 100K route graphic shows eight principal aid/support points and a course that starts and finishes at Ban Mae Na School before moving through forested and mountain terrain around Chiang Dao.

Race-pack collection is split across race week. Current listings show a 10:00-18:00 collection window at Decathlon Chiang Mai on Thursday 17 December and at Ban Mae Na School on Friday 18 December. Shorter-distance runners also have a Ban Mae Na School collection window on Saturday 19 December. Registration is currently scheduled to close on 19 November 2026. Runners should check the official registration page for any late operational changes or category-specific collection instructions.