Caldera Crown 100K

UTMB World Series

101.2km·4205m+

June 12

Waterfront City Pangururan,

Indonesia

utmb·source

Caldera Crown 100K · Race profile

Distance: 101km
Gain: 4205m+
FlatKM: 137.7
Max: 1968m
Min: 904m

About Caldera Crown 100K

Caldera Crown 100K is the 101km ultra trail 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.

Race strategy

Hold a steady pace and save energy for every section.

970m descent. Go easy, save your quads.
Steep 41% wall. Control your pace and stay focused.
The finish is runnable. Save your legs to run it all the way.
Long race. Control your HR and effort. Early mistakes cost the most.
Ease into the early runnable section, save your quads on the descents until 60.1km, then run your race pace.
Start · 0.0km–1.6km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
Settle in · 1.6km–49.8km · Descent of 267m averaging 5%, climb of 1055m, high point 1969m. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace. This descent is hard on the legs: short steps, stay in control, poles if you have them. Running pays off here: run wherever you can. Hike the steepest pitches.
Work · 49.8km–60.1km · Descent of 970m averaging 9%. This is where the race is built: steady, solid effort. This descent is hard on the legs: short steps, stay in control, poles if you have them.
Fade · 60.1km–81.4km · Climb of 625m, climb of 682m. Plus 2 more descents. Your energy fades, and that's normal: hold a steady effort and stop counting the miles. Climb by heart rate or breathing, not pace. Hike the steepest pitches. Your heart rate drifts down on its own: don't chase your early-race numbers, go by feel.
Home · 81.4km–101km · 19.2km of runnable trail. No heroics: settle back into your own effort and hold it to the line. Running pays off here: run wherever you can.

Course

The course climbs 4205m+. With 42m/km of climbing, this is a rolling, mostly runnable course. By gradient, 33% of the distance is uphill, 30% downhill and 37% flat. The longest climb runs 8.6km at an average 7.9% grade (682m of vertical). The longest descent runs 10.3km at an average 9.5% grade (970m of vertical). The steepest climb averages 41.3% over 0.6km. The steepest descent drops at 48.0% over 0.7km. Surface: 52% road, 23% trail, and 15% smooth. Flat-equivalent effort: 137.7 FlatKM.

Poles

Trekking poles are strongly recommended: about 4.3km of the course is steep enough for them to pay off.

Other races: Indonesia

Read

100K trail race calendar

Race Pace Calculator · GPX Analyzer · Trail Finder

About Caldera Crown 100K

Race strategy

Hold a steady pace and save energy for every section.

970m descent. Go easy, save your quads.
Steep 41% wall. Control your pace and stay focused.
The finish is runnable. Save your legs to run it all the way.
Long race. Control your HR and effort. Early mistakes cost the most.
Ease into the early runnable section, save your quads on the descents until 60.1km, then run your race pace.
Start · 0.0km–1.6km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
Settle in · 1.6km–49.8km · Descent of 267m averaging 5%, climb of 1055m, high point 1969m. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace. This descent is hard on the legs: short steps, stay in control, poles if you have them. Running pays off here: run wherever you can. Hike the steepest pitches.
Work · 49.8km–60.1km · Descent of 970m averaging 9%. This is where the race is built: steady, solid effort. This descent is hard on the legs: short steps, stay in control, poles if you have them.
Fade · 60.1km–81.4km · Climb of 625m, climb of 682m. Plus 2 more descents. Your energy fades, and that's normal: hold a steady effort and stop counting the miles. Climb by heart rate or breathing, not pace. Hike the steepest pitches. Your heart rate drifts down on its own: don't chase your early-race numbers, go by feel.
Home · 81.4km–101km · 19.2km of runnable trail. No heroics: settle back into your own effort and hold it to the line. Running pays off here: run wherever you can.

Course

Poles

Trekking poles are strongly recommended: about 4.3km of the course is steep enough for them to pay off.

Quad damage

Quad damage risk is moderate (index 41 of 100), with 31% of the load in the first half: 2 descents deserve a plan and a couple of downhill sessions before race day.

Ease into the early runnable section, save your quads on the descents until 60.1km, then run your race pace.
#2 · 23.3–28.9 km · 267 m D−, -4.8% · 71.7 km ahead → control
#1 · 49.8–60.1 km · 970 m D−, -9.5% · 40.6 km ahead → control
76.8–81.4 km · 731 m D−, -15.8% · 19.2 km ahead → your pace

Weather

On race day, start temperatures have historically ranged from 21°C to 23°C, with around 15°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 Caldera Crown 100K.

Other distances of Trail of the Kings - Lake Toba by UTMB 2027Ultimate Expedition 60K (64.0km)·King's Ascent 25K (23.6km)·Legacy Dash 17K (17.0km)

Other editions of Caldera Crown 100K2026

Official websitelaketoba.utmb.world