BTS100 Ultra 2026
RunningBromo Tengger Semeru National Park, East Java, Indonesia
Indonesia's best-known volcano ultra returns to Bromo Tengger Semeru National Park in East Java, where runners take on distances from 8 km all the way up to 170 km in a UTMB Index race.
Race categories
170 KM100 KM70 KM35 KM18 KM8 KM
Race morning
Dawn temperature in race week, the last 10 years
The average daily low across the week around race day. The dashed line is a typical Singapore dawn.
Source: Open-Meteo historical weather (ERA5). Singapore's typical dawn is its average daily low, 24°C (2021–2025).
More races around these dates
17Oct
SatStride For Good 2026TBC17Oct
SatSDBA-AustCham 10km Dragon Boat Challenge 2026Marina Bay18Oct
SunGarmin Run Marathon Series Vietnam 2026Thu Duc City, Ho Chi Minh City Vietnam18Oct
SunAsian Para Games Aichi-Nagoya 2026Venues across Aichi24Oct
SatJakarta Running Festival 2026Jakarta Indonesia25Oct
SunGarmin Run Marathon Series Singapore 2026Marina Barrage25Oct
SunPOSB PAssion Run for Kids 2026The Promontory @ Marina Bay28Oct
WedGarmin Noosa Triathlon 2026Noosa Queensland
SatStride For Good 2026TBC17Oct
SatSDBA-AustCham 10km Dragon Boat Challenge 2026Marina Bay18Oct
SunGarmin Run Marathon Series Vietnam 2026Thu Duc City, Ho Chi Minh City Vietnam18Oct
SunAsian Para Games Aichi-Nagoya 2026Venues across Aichi24Oct
SatJakarta Running Festival 2026Jakarta Indonesia25Oct
SunGarmin Run Marathon Series Singapore 2026Marina Barrage25Oct
SunPOSB PAssion Run for Kids 2026The Promontory @ Marina Bay28Oct
WedGarmin Noosa Triathlon 2026Noosa Queensland
About this race
When is BTS100 Ultra 2026?
BTS100 Ultra 2026 is on Saturday 7 November 2026, in Bromo Tengger Semeru National Park, East Java, Indonesia.
How do I enter?
Entry runs through the organiser. Start at the official site and check it for registration dates, prices and any ballot.