Gunung Sumbing - Via Butuh is a climb of 7.2 kilometers (hors catégorie). Gunung Sumbing - Via Butuh tops out at 1,994 m above sea level. It is located in Temnaggung, Jawa Tengah, Indonesia. The average gradient is 16.3% with a maximum of 23.7%. The climb has 1172 meters of elevation gain.
Difficulty breakdown: This climb is brutally steep, with an average gradient of 16.3% over 7.2 km, which puts it firmly in the HC category. The difficulty ramps up progressively, peaking over the last two kilometres where the gradient hits 29%, 26% and even 47% over the final 200 metres. The sustained vertical gain tops 160m/km on the finale.
How to manage the effort:
1. Pacing: Start easy on the opening kilometres (7-11%) and save your legs. Your max effort belongs in the 17-18% sections (KM 3.5-4.5) and above all in the final push beyond 25%.
2. Gearing: Run a very compact setup (e.g. 34x32 or lower) to keep a workable cadence on the sections above 15%, which make up more than half the climb.
3. Mental focus: Break the climb into chunks. The first 5 km are demanding, but the last 2 require total concentration to get through the extreme gradients.
7.2 km • 1172 m D+
VAM: average climbing speed, based on elevation gain
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