Race planning

Plan BTS 100 Ultra 170K

Use the listed edition as your starting point. Each tool keeps imported race facts separate from the targets and assumptions you choose.

Edition notes: The organizer’s schedule starts the 170 km and 100 km at 12:01 AM on Saturday, November 7, Western Indonesian Time (UTC+7). The 170 km limit runs to 6:01 PM on Sunday, November 8. The 2026 event also has 70, 35, 18 and 8 km races. The organizer’s main BTS100 link now shows the 2027 edition, so 2026 details sit under its bts100-2026 pages. Its rules mention a 2026 Runner Guide, but the site links no copy and no 2026 tracking page (checked November 5).

Listed edition

Nov 7, 2026 – Nov 8, 2026

Format

Fixed-Distance

Distance

170 km

Local start time

12:01 AM Saturday

Duration / cutoff

42 hours

Crew and pacers

Pacers are banned, and non-registered runners may not run alongside racers. Family and friends may support a runner only at WS6 Jemplang, which the 170 km reaches at km 57 and km 145. Supporters must arrange their own transport, pay their own entry fee and meals, and can’t take aid-station food or drinks. Help anywhere else counts as outside support and can bring a penalty or disqualification. In 2025 the support area was at Bromo Hillside (Cafe 360º).

Drop bags

170 km runners have drop bags at WS6 Jemplang (km 57), WS9 Pananjakan (km 93) and WS6 Jemplang again (km 145). Drop-bag and race-pack check-in closes at 4:00 PM on Friday, November 6. The organizer takes no responsibility for valuables left in a bag.

Recorded facts reviewed Nov 5, 2026. Check the organizer’s latest rules. Calendar downloads use all-day dates and do not set a starting alarm.