King's Ascent 25K is the 23.6km trail race at Trail of the Kings - Lake Toba by UTMB 2027 (Waterfront City Pangururan, Indonesia). The race starts on June 12, 2027. It starts in Waterfront City Pangururan.
Run hard on the first mountain, but save energy for the second.
The course climbs 1206m+. With 51m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 31% of the distance is uphill, 37% downhill and 32% flat. The longest climb runs 7.7km at an average 13.7% grade (1055m of vertical). The longest descent runs 10.2km at an average 9.9% grade (1006m of vertical). The steepest climb averages 41.5% over 0.7km. The steepest descent drops at 38.7% over 0.5km. Surface: 52% road and 29% trail. Flat-equivalent effort: 37.4 FlatKM.
Poles bring little benefit here: only about 3.4km of pole-friendly terrain.
Quad damage risk is low (index 16 of 100): a few descents worth noting, none of them decisive.
On race day, start temperatures have historically ranged from 21°C to 23°C, with around 17°C at the highest point; the chance of precipitation is about 63%. Heavy rain of 10.0mm or more falls on about 19% of days around this date.
This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for King's Ascent 25K.
Other distances of Trail of the Kings - Lake Toba by UTMB 2027Caldera Crown 100K (101km)·Ultimate Expedition 60K (64.0km)·Legacy Dash 17K (17.0km)
Other editions of King's Ascent 25K2026·2025
Official websitelaketoba.utmb.world