classic
Grebbeberg loop
20.5 kilometres with 92 metres of climbing.
It's almost flat, and that is exactly what makes it hard: you pedal the whole way, with no descent to recover on. Wind and an even pace decide your time.
- Distance
- 20.5 km
- Climbing
- 92 m
- Steepest 500 m
- 8%
- Highest point
- 52 m
- Wind
- from the south-west
- Landscape
- meadows, polders, forest
- Type
- classic
Ride it as often as you like, and see afterwards where you lost time.
Ride this courseFree during the beta, until 31 December. Then €3 a month.
Works on your laptop in Chrome or Edge, with a Bluetooth smart trainer.
How long it takes
Your bike time at an even power, worked out with the same model as in the app.
| Power | Bike time | Average |
|---|---|---|
| 150 W | 0:43 | 28.9 km/h |
| 200 W | 0:37 | 32.9 km/h |
| 250 W | 0:34 | 36.1 km/h |
| 300 W | 0:32 | 38.9 km/h |
For a 75 kg rider on an 8 kg road bike, with no wind, no drafting and no stops. On a time-trial bike you are faster. In the app you work it out with your own weight and power, or the other way round: the power you need for your target time.
Where it gets hard
- From km 4.7 to km 5.6: 45 metres up over 1.0 km, 4.7% on average.
Questions about this course
How long does Grebbeberg loop take?
At an even 200 watts about 0:37 hours, averaging 32.9 km/h. At 150 watts it is 0:43, at 250 watts 0:34. That is for a 75 kg rider with no wind; in Cadence Rides you work it out with your own weight and power.
How much climbing is there in Grebbeberg loop?
92 metres of climbing over 20.5 kilometres, with the highest point at 52 metres. The steepest 500 metres average 8%.
Can I ride Grebbeberg loop indoors on my smart trainer?
Yes. With Cadence Rides you ride it in your browser, on a Bluetooth (FTMS) smart trainer, such as most trainers from Wahoo, Tacx and Elite and the Zwift Hub. The trainer gets heavier where the road goes up. It works on your laptop in Chrome or Edge, and on Android.
What does it cost?
Nothing during the beta, until 31 December 2026. Then €3 a month, €18 for six months or €30 a year, and every new rider can try it free for 15 days first.