Clarendon Marathon.
The Clarendon Marathon links Salisbury and Winchester along the ancient Clarendon Way, more than nine tenths of it off road on country tracks and paths. The Rotary clubs of both cities have run it as a charity event since 1998, and preparing for it means preparing for the second half, where the steepest climbs wait.
Clarendon Marathon 2027: Course, Elevation & Route Profile
The course runs point to point, from Salisbury to a finish in Winchester, following the historic Clarendon Way with a few extra turns along the way. Almost all of it is on country tracks and paths, with tarmac the exception. Runners in the Mini share the final five miles into Winchester with the marathon field, and four-person relay teams split the whole route between them.
The first half climbs in waves. A climb of just over a kilometre starts at km 3, two shorter ramps follow around km 8 and 9, and the first high point comes near km 11. From there the course gives back almost everything it gained, reaching its lowest stretch between km 20 and 25.
The real test starts out of that valley. Between km 26 and 32 four climbs come in quick succession, two of them short with pitches above twelve percent, and the longest rises for a kilometre at around eight percent from km 31 to the highest point of the day. The last ten kilometres keep rolling, and Winchester sits roughly 90 metres above the start.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 3.1 | 1.1 km | 5.2 % | 7.5 % | +59 m | — |
| km 7.9 | 0.7 km | 4.8 % | 8.1 % | +34 m | — |
| km 8.9 | 0.7 km | 4.4 % | 8.2 % | +32 m | — |
| km 18.2 | 0.9 km | 4.5 % | 7 % | +38 m | — |
| km 25.8 | 0.9 km | 4.9 % | 13.4 % | +42 m | — |
| km 27.9 | 0.6 km | 8.1 % | 13.8 % | +45 m | — |
| km 29 | 1.2 km | 4.3 % | 7.7 % | +51 m | — |
| km 31.1 | 1 km | 8 % | 12.9 % | +80 m | Cat. 4 |
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 Clarendon Marathon 2027.
Start under control
Around 750 metres of climbing on country tracks make the Clarendon Marathon a race run by feel rather than by kilometre splits. Plan your target time around effort: walking or easing up the rises of the first half costs little, because they matter less than what comes after km 25.
Hold your rhythm
The biggest trap is the long stretch from km 11 to km 25. It falls almost the whole way, your legs feel fresh, and this is exactly where runners go too fast. Running downhill on tracks tires the quads more than it seems to, and the bill arrives straight away.
Spend what is left
The race is decided between km 26 and 32, where the four climbs come close together. Hike the steep pitches without guilt, use the tops to get running again, and keep something for the kilometre-long climb from km 31. If you are still moving well at the top, the rolling final ten kilometres into Winchester are yours to shape.
Training plan for Clarendon Marathon 2027: 12-week build
Build the base
Age-group runners take roughly 3:45 to 5:30 hours over the Clarendon Marathon. The effort is mostly aerobic but keeps being broken by short, hard climbs, and on paths your stride is never as even as it is on the road.
Train race pace
The decisive kilometres come late. Build your long runs so the hilly ground falls in the final third, and practise switching between a brisk hike on the steep pitches and running over the top. At least one run of three hours or more on tracks belongs in the build, even at a slow pace.
Rehearse the course
The long descent into the valley asks for resilient quads. Controlled downhill running and leg strength work make sure the muscles you need for the climbs between km 26 and 32 are still there when you reach them.
Arrive fresh
With more than nine tenths of the route off road, run most of your volume on unpaved ground and test shoes and fuelling there. The race is held in early October, so the longest sessions fall in late summer.
Courses
Download the Clarendon Marathon 2027 course as a GPX file for your watch or bike computer.
Let YOUB adapt your plan for Clarendon Marathon 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 Clarendon Marathon.
How long is Clarendon Marathon 2027?
Clarendon Marathon 2027 is 41.84 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 Clarendon Marathon 2027 have?
Clarendon Marathon 2027 has around 751 m of elevation gain over 41.84 km. That affects pacing, muscular load, and preparation for late-race sections.
What is the route profile of Clarendon Marathon 2027?
Clarendon Marathon 2027 is classified as Rolling, averaging 17.7 vertical metres per kilometre. 21% of the route is flat, 38% climbs moderately (2 to 6%) and 4% is steeper than 6%.
What climbs does Clarendon Marathon 2027 have?
The hardest climb of Clarendon Marathon 2027 starts at kilometre 31.1, runs for 1 km at an average of 8% and gains 80 metres. Cycling-convention rating: Cat. 4. 8 climbs are mapped in total.
Is Clarendon Marathon 2027 a loop course?
No, Clarendon Marathon 2027 is a point-to-point course: start and finish are in different places.
Is there a GPX file for the Clarendon Marathon 2027 course?
Yes. The Clarendon Marathon 2027 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 Clarendon Marathon 2027?
Preparation for Clarendon Marathon 2027 should account for 41.84 km, 751 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 Clarendon Marathon 2027?
The pacing strategy for Clarendon Marathon 2027 should reflect 41.84 km, 751 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 Clarendon Marathon 2027 take place?
Clarendon Marathon 2027 takes place on October 3, 2027.
Where does Clarendon Marathon 2027 take place?
Clarendon Marathon 2027 takes place in Salisbury, United Kingdom.
Which distances does Clarendon Marathon 2027 offer?
Clarendon Marathon 2027 offers 4 distances — Clarendon Marathon: 41.84 km; Clarendon Half Marathon: 20.92 km; Clarendon Mini: 8.05 km; Clarendon Relay: 41.84 km.
How do I register for Clarendon Marathon 2027?
Registration runs through the organiser: clarendon-marathon.co.uk. YOUB shows you the course, elevation profile and training plan for your preparation.
