Centurion Hundred Hills 50km.
The Centurion Hundred Hills 50km is a March season opener built from two different 25 km loops through the Chiltern Hills, each ending at Stonor Park near Henley-on-Thames. No single mountain makes it hard. The sheer number of short climbs does, and that is what your preparation has to address.
Centurion Hundred Hills 50km 2027: Course, Elevation & Route Profile
Start and finish are at Stonor Park in Stonor, and the course brings you back there once at halfway. It is made of two different loops, so you never run the same lap twice. The marked route uses trails through the hills of the Chilterns, through ancient woodland and through villages. March weather here is changeable: average temperatures range from 0 to 12 degrees, and wet conditions are possible too. Five well-stocked aid stations and full medical support back the field.
The first loop shows both sides of the course early. From km 2.8 the trail rises steadily for just over two kilometres, about four percent and comfortably runnable. At km 7.2 comes the opposite, a ramp of half a kilometre averaging nearly 16 percent. This is where most people walk, since it peaks at 24 percent. By km 9.4 you are climbing again for a little over a kilometre.
That is how it continues. Around 1,275 metres of ascent come from many waves like these, and you hand each one back on the next descent, because the day ends at the height it began. Most of the climbs sit in the first loop. The second has fewer, but it meets legs that have already taken 25 kilometres of up and down.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 2.8 | 2 km | 4.2 % | 8.7 % | +84 m | Cat. 4 |
| km 7.2 | 0.6 km | 15.7 % | 24 % | +86 m | Cat. 4 |
| km 9.4 | 1.2 km | 7.6 % | 19.1 % | +87 m | Cat. 4 |
| km 13.3 | 0.5 km | 16.6 % | 28.9 % | +83 m | Cat. 4 |
| km 15.7 | 0.7 km | 11.4 % | 17.6 % | +80 m | — |
| km 19.1 | 2.3 km | 4.4 % | 13.1 % | +100 m | Cat. 4 |
| km 24.2 | 0.6 km | 14.9 % | 23.6 % | +93 m | Cat. 4 |
| km 43.6 | 0.7 km | 9.8 % | 14.8 % | +71 m | — |
Climb categories follow the road-cycling convention and rate the terrain itself (length and gradient) regardless of sport: Cat. 4 marks the easiest rated climbs, Cat. 1 the hardest, and HC (hors catégorie, “beyond categorization”) is reserved for the most brutal ascents. Short climbs below the Cat. 4 threshold stay unrated.
How to pace Centurion Hundred Hills 50km.
Start under control
Pace this course by effort, not by kilometre splits. Ramps and descents alternate so tightly that a target pace tells you nothing. You can run the long climb from km 2.8, but only at a level where you could still talk. Walk the steep pitches like the one at km 7.2 briskly from the very first, rather than forcing them because your legs happen to be fresh.
Hold your rhythm
The trap is the first loop. This is where the ramps pile up, and if you run all of them and then let go on the way down you pay twice, once in the calves and once in the quads, because this course drops as far as it rises. On wet ground every hard braking step costs more.
Spend what is left
The day is decided when you leave Stonor Park at halfway. If you are still moving easily there, the second loop with its fewer climbs is yours to use; everyone else just gets through it. Use the aid stations from the start, and on a cold day keep those stops short so you do not chill.
Training plan for Centurion Hundred Hills 50km: 12-week build
Build the base
Age-group runners should expect roughly five and a half to eight hours. The effort stays mostly aerobic but is constantly interrupted: short hard spikes on the climbs, then descents that ask more of your muscles than your lungs. It is never a steady effort like a road run.
Train race pace
What decides this race is repetition rather than any one climb. Two abilities matter: walking many steep pitches briskly without overreaching, and still being able to run on the second loop. On a course with no long quiet stretches, tired legs will limit you before your endurance does.
Rehearse the course
Your key session is therefore the long run on hilly terrain, practising the switch between walking and running and deliberately picking up the second half. Add repeated uphill intervals on a steep slope, sized on the ramp at km 7.2. Controlled downhill running and strength work for the quads belong alongside them, because this course makes you absorb well over 1,200 metres of descent.
Arrive fresh
With the race in March, your build falls in winter. Put long runs on cold, wet days on purpose and use them to test clothing and shoes on slippery ground. That way you know what works near freezing as well as at 12 degrees. Navigation needs no practice, since the course is marked.
Courses
Download the Centurion Hundred Hills 50km course as a GPX file for your watch or bike computer.
Let YOUB adapt your plan for Centurion Hundred Hills 50km dynamically
Ben connects your goal, the course, current load, recovery, and calendar. Your plan stays pointed at race day even when real life is not perfectly plannable.
Everything about Centurion Hundred Hills 50km.
How long is Centurion Hundred Hills 50km?
Centurion Hundred Hills 50km is 50 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
How much elevation gain does Centurion Hundred Hills 50km have?
Centurion Hundred Hills 50km has around 1,275 m of elevation gain over 50 km. That affects pacing, muscular load, and preparation for late-race sections.
What is the route profile of Centurion Hundred Hills 50km?
Centurion Hundred Hills 50km is classified as Hilly, averaging 25.6 vertical metres per kilometre. 16% of the route is flat, 33% climbs moderately (2 to 6%) and 10% is steeper than 6%.
What climbs does Centurion Hundred Hills 50km have?
The hardest climb of Centurion Hundred Hills 50km starts at kilometre 19.1, runs for 2.3 km at an average of 4.4% and gains 100 metres. Cycling-convention rating: Cat. 4. 8 climbs are mapped in total.
Is Centurion Hundred Hills 50km a loop course?
Yes, Centurion Hundred Hills 50km is laid out as a loop: start and finish are in the same place.
Is there a GPX file for the Centurion Hundred Hills 50km course?
Yes. The Centurion Hundred Hills 50km course is on this page as a free GPX download — ready to import into Garmin, Wahoo, Komoot, Strava or any other app that reads GPX.
How should I prepare for Centurion Hundred Hills 50km?
Preparation for Centurion Hundred Hills 50km should account for 50 km, 1,275 m of elevation gain, current training load, and available training time. An adaptive plan helps place key sessions without ignoring recovery and real life.
What pacing strategy works for Centurion Hundred Hills 50km?
The pacing strategy for Centurion Hundred Hills 50km should reflect 50 km, 1,275 m of elevation gain, and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
When does Centurion Hundred Hills 50km 2027 take place?
Centurion Hundred Hills 50km 2027 takes place on March 20, 2027.
Where does Centurion Hundred Hills 50km 2027 take place?
Centurion Hundred Hills 50km 2027 takes place in Stonor, United Kingdom.
How do I register for Centurion Hundred Hills 50km?
Registration runs through the organiser: centurionrunning.com. YOUB shows you the course, elevation profile and training plan for your preparation.
