Watson's Hill is a small rise near Semer in Suffolk, climbing south-west along the approach recorded here. About 600 metres of road are enough to lift the ride out of its previous rhythm, without turning the ascent into a prolonged undertaking. The overall slope is moderate, and the hill's interest comes from that brief change of level within the surrounding countryside.
The climb asks for a little more pressure at the pedals rather than a wholesale change in the character of the ride. There is time to feel the road rising, but little room for separate opening, middle and finishing chapters. Its compact shape makes the effort easy to understand: a short ascent, completed before it has developed into a long drag. Watson's Hill has a modest scale, and that is part of its appeal on a Suffolk ride.
01 / The ascent
Elevation profile
02 / The numbers
Climb statistics
- Distance
- 0.60 km
- Elevation gain
- 30 m
- Average gradient
- 5.0%
- Climb category
- Uncategorized
- Start elevation
- 39 m
- Summit elevation
- 69 m
03 / Your effort
How long would it take?
Enter the power you could hold for the whole climb. We calculate a moving time from the elevation profile and the forces you ride against.
Use your intended climbing effort, rather than FTP unless you can hold it for the predicted duration.
Bike + kit includes clothing, bottles and luggage.
Advanced settings
Defaults represent a road-bike scenario. Adjust these settings to match your tyres, drivetrain and riding position.
Modelled moving time
2 min
- Power throughout
- 225 W
- Average speed
- 15.9 km/h
Based on the 0.60 km elevation profile. Assumes steady power, with no stops, braking or drafting. Rounded to the nearest minute.
The science behind the calculation
For each part of the stored profile, we solve the steady-state cycling power equation for speed, then add distance ÷ speed across the climb. Gravity uses rider + equipment weight; available power is W/kg × rider weight. This uses the profile’s distance and elevation together, without mixing in another route’s metrics.
Power × efficiency = gravity + rolling resistance + air resistance + bearing losses
The resistance equations are adapted from Martin et al. (1998), Validation of a Mathematical Model for Road Cycling Power. Air density changes with profile altitude using NASA’s standard-atmosphere model. This calculator’s adaptation has not been independently validated.
It predicts travel at the power you enter, including on descents. It does not model acceleration, cornering, braking, traffic, wind, changing weather or fatigue. At altitude, choose power you can sustain there: thinner air reduces drag, but this model does not predict its effect on your ability to produce power. Profile quality and assumed equipment settings also affect the result.
04 / On the ground
Route map
Route overview
Watsons Hill
- Route length
- 0.60 km
- Total ascent
- 30 m
- Average gradient
- 5.0%
05 / Take it home
The climb, as artwork
Turn the route into a personalised topographic print. Choose your colours and composition, then download your artwork.
06 / Keep exploring
Nearby climbs
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Kingston Blount
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Brill Hill
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Barhatch Lane
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