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Bucovina Ultra Rocks by UTMB
114km11472km7248km4833km3320km2016.5km16.5

Rumble Rock

UTMB World Series
16.5km
July 25, 09:30 AM
Alpin Rarau,
Romania
utmb·source

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Other races: Romania

Read

  • How to Taper for a Marathon, Half Marathon or Ultra
  • Types of Runs and What Each Workout Actually Trains
  • Hill Training for Trail Runners: Train the Descents

Rumble Rock · Race profile

Distance
16.5km
FlatKM
22.4
Max
1500m
Min
646m

About Rumble Rock

Rumble Rock is the 16.5km trail race at Bucovina Ultra Rocks by UTMB 2027 (Alpin Rarau, Romania). The race starts on July 25, 2027 at 09:30 AM. It starts in Alpin Rarau.

Race strategy

Run the downhill at race pace, but focus on the climb.

  • Final 511m descent. Save your legs to go all out on it.
  • Steep 31% wall. Control your pace and stay focused.
  • Go easy on the first downhill, then run your race pace, and go all out on the final descent from 13.8km.
  • Start · 0.0km–1.9km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Settle in · 1.9km–12.0km · Descent of 797m averaging 7%, high point 1500m. Ease in: hold back more than feels necessary. The race is still ahead. This descent is hard on the legs: short steps, stay in control, poles if you have them.
  • Work · 12.0km–13.8km · Plus 1 more climb. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace.
  • Home · 13.8km–16.8km · Descent of 511m averaging 17%. Build to the finish: leave whatever you have left out on the course. Long descent: keep it even and let go only near the end. Hike the steepest pitches.

Course

By gradient, 30% of the distance is uphill, 67% downhill and 4% flat. The longest climb runs 1.8km at an average 10.9% grade (192m of vertical). The longest descent runs 12.0km at an average 6.6% grade (797m of vertical). The steepest climb averages 20.6% over 0.2km. The steepest descent drops at 34.5% over 0.5km. Flat-equivalent effort: 22.4 FlatKM.

Poles

The course is runnable enough that trekking poles are not needed.

Quad damage

Quad damage risk is low (index 18 of 100): a few descents worth noting, none of them decisive.

  • Go easy on the first downhill, then run your race pace, and go all out on the final descent from 13.8km.
  • #1 · 0.0–12.0 km · 797 m D−, -6.6% · 4.8 km ahead → your pace
  • 13.8–16.8 km · 511 m D−, -16.7% · 0.0 km ahead → even, let go at the end

This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Rumble Rock.

Other distances of Bucovina Ultra Rocks by UTMB 2027Ultra Rocks (114km)·Four Summits (72.0km)·Lady's Rocks (48.0km)·Rocky (33.0km)·Radical (20.0km)

Official websitebucovina.utmb.world