The GU Forest Force Run Series 2026 is the largest trail running series in Singapore, staged from the Dairy Farm MOE Adventure Centre at the edge of the Central Catchment nature reserves. It features a 21km trail half marathon on Sunday, 5 July 2026 and a 30km trail ultra on Sunday, 13 September 2026.
Built for trail and ultra-distance runners, the technical forest routes demand far more than their road equivalents, so plan a longer training block than the distance suggests. Registration is open via King Trail Events, with categories from 21km to 30km.
