Great Barrow Challenge

JUL
29
2027
Day one at Suffolk Running Centre uses the flat Denham Flats road loop with distance options from 5k to ultra and base camp support including aid and parking.
Thu 29 Jul 2027
Marathon Half Marathon 10 kilometers 5 kilometers

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Great Barrow Challenge Day 1 - Denham Flats

Hosted by Zig Zag Running at the Suffolk Running Centre in Bury St Edmunds, this entry covers day one of a ten day series. Day one uses the Denham Flats route, described as a 10.4 km out-and-back from the campsite on quiet lanes and entirely on road, with 22 m of climb and elevations between 89 m and 107 m. The route turns at about 5.2 km and runners retrace their steps back to the start.

Distances offered on this day:

  • 5k: out to a 5k turnpoint then return to Suffolk Running Centre
  • 10k: one full Denham Flats loop
  • Half marathon: two loops of the 10.4 km route
  • Full marathon: four loops of the 10.4 km route
  • Ultra: either four loops plus a 5k turnpoint or five full loops

Race HQ and the lap point are at base camp, where a water and aid station will be located. Parking is included in the entry price. A GPX file for the course can be downloaded from the course tab. Organisers provide a bespoke medal at the end of each day. The event operates a cupless policy so participants should use their own bottles or cups for refilling. No dogs or buggies are allowed on this open-road route. Headphones are not permitted except bone conductor types. Routes for other days in the series are subject to change. Visit the organization's website for the most recent information.

Marathon
Full Marathon
Half Marathon
Half Marathon
10 km
10k
5 km
Ultra Marathon

Events nearby

A relaxed 5 km trail run at Rougham Estate with post-run burritos, live music and free onsite parking; age 16+ and organised by RunVibes on 18 September 2026.
Entry level 34 mile ultra through Suffolk and Norfolk trails on 19 September 2026 with aid stations, first aid, an 11 hour cut off and a 150 entrant limit.
Guided 10 km trail run at High Lodge in Thetford Forest with conversational pace, route tips, recommended trail shoes, and a chance to see woodland wildlife.
Free 5K social group run in Brandon on footpaths, dirt tracks and pavements passing local heritage sites; limited to 25 runners and family friendly.
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