
The Weald Challenge is a trail half marathon with a little extra: 22.2 km from Chiddingly in Sussex, out on the Wealdway and home on the Vanguard Way. There is no big hill to prepare for, only short climbs and a constant change of rhythm between quiet lanes, bridleways and footpaths, and that is what the preparation has to answer.
Start and finish are at Chiddingly Primary School, in the village itself. Uckfield Runners have run the event since 2024, when they took it over from Trail Running Sussex. Entries are capped at 400, a limit earlier editions came close to or reached. The loop joins two paths: out on the Wealdway, home on the Vanguard Way, with quiet lanes, bridleways and footpaths along the way.
The outward leg is kind. The climbs near km 3.4 and km 5.3 last only a few hundred metres, and the first checkpoint, Newplace Park, comes after about 9 km. Beyond it the course changes: between km 10.5 and km 14 three climbs arrive close together, among them the longest of the day from km 11.6, 850 metres with the steepest pitch at just over 8 percent. None is hard on its own, but there is little ground between them to loosen the legs again.
After Scallow Bridge, the second checkpoint around km 16, the last climb of any note comes at km 18. The way back also holds the longest road section, a little under two kilometres in one go. Road adds up to about four and a half kilometres in total, mostly around the start and finish and near the villages, so the final metres are back on a firm surface.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 3.4 | 0.5 km | 3.8 % | 4.8 % | +17 m | — |
| km 5.3 | 0.8 km | 3.7 % | 5.9 % | +29 m | — |
| km 10.5 | 0.6 km | 4.9 % | 7.8 % | +28 m | — |
| km 11.6 | 0.9 km | 4.1 % | 8.3 % | +35 m | — |
| km 13.3 | 0.5 km | 4.3 % | 6.6 % | +22 m | — |
| km 17.9 | 0.6 km | 4.7 % | 7.8 % | +30 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.
Even effort matters here, not even pace. The switching between road, bridleway and path makes your kilometre splits a poor gauge, so run by feel as far as Newplace Park and keep your breathing calm on the two early climbs. Those first 9 km should feel almost too easy.
The race is decided between km 10.5 and km 14. Take each of the three climbs so that you can run straight away at the top rather than having to recover first. Short steps, or a few metres of walking, are a fair way to defuse the pitch of just over 8 percent. Overreach here and you still have eight kilometres and another climb to come.
The trap is in the label: run a half marathon in your head and you are 1.1 km short, and those are the metres you miss when the legs are empty. Budget for 22.2 km. The long road section on the way back also tempts you to wind it up. Use it to loosen your stride instead, and save any speed for after the last climb.

Age-group runners are out for roughly two to three hours. The effort is mainly aerobic but keeps being broken by short spikes, because the climbs are brief and rarely last more than a few minutes. Your base has to carry a long run, and the hills ask for the ability to recover while still running.
The key session copies the stretch from km 10.5 to km 14: three hills of 500 to 800 metres in a row, with only about half a kilometre of easy jogging between them. Time on the hill matters less than getting back into your running immediately at the top. Place the set late in a longer run, because the race serves it well past 10 km, and the final climb at km 18 is still to come.
The surface deserves its own attention. Do your long runs on a mix of bridleways, footpaths and quiet lanes, and change surface on purpose so that your stride gets used to the transitions. Your longest run should reach race distance, not merely 21 km, and end with a stretch of road as the Challenge does. Use it to test your shoes on both surfaces as well, rather than deciding on race day.
An early June date puts the build in spring, so the longest runs belong in May. Practise fuelling in the blocks the race sets: about 9 km to Newplace Park, a little over 7 more to Scallow Bridge, then about 6 to the finish.

Download the Weald Challenge course as a GPX file for your watch or bike computer.
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.
Weald Challenge is 22.2 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
Weald Challenge has around 313 m of elevation gain over 22.2 km. That affects pacing, muscular load, and preparation for late-race sections.
Weald Challenge is classified as Rolling, averaging 13.6 vertical metres per kilometre. 22% of the route is flat, 35% climbs moderately (2 to 6%) and 1% is steeper than 6%.
The hardest climb of Weald Challenge starts at kilometre 11.6, runs for 0.9 km at an average of 4.1% and gains 35 metres. 6 climbs are mapped in total.
Yes, Weald Challenge is laid out as a loop: start and finish are in the same place.
Yes. The Weald Challenge 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.
Preparation for Weald Challenge should account for 22.2 km, 313 m of elevation gain, current training load, and available training time. An adaptive plan helps place key sessions without ignoring recovery and real life.
The pacing strategy for Weald Challenge should reflect 22.2 km, 313 m of elevation gain, and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
Weald Challenge 2027 takes place on June 6, 2027.
Weald Challenge 2027 takes place in Chiddingly, United Kingdom.
Registration runs through the organiser: uckfieldrunners.co.uk. YOUB shows you the course, elevation profile and training plan for your preparation.