The race route consists of a single 50 mile loop through the Chiltern Hills. Starting and finishing in the riverside village of Goring On Thames, It begins by heading down the 'hilliest' section of the Thames Path National Trail to Whitchurch, before joining the Chiltern Way on to Aid Station 1 at Tokers Green. The section through to Bix is gradually ascending but continues to be relatively fast running. Upon leaving Bix, the next section around to Ibstone check point contains more of the elevation change and will be tougher going, though that is couteracted by the spectacular scenery. Runners head through Stonor park and pay a visit to Turville, climbing steeply out of the village directly past Cobstone Windmill. After Ibstone, Runners then continue on the Chiltern Way to the highest point on the course at Christmas Common (800ft), before a screaming fast descent underneath Watlington Hill, to join the Ridgeway as far as Swyncombe Farm aid station. Runners then take athe Chiltern Way extension first east, then west to rejoin the Ridgeway at Nuffield. From there it's Grim's Ditch and the Ridgeway until the final aid station, where runners turn off and make their way on the final 9.1 miles to the finish back in Goring on Thames.
The route has 5,800 feet of climb, and 5,800 feet of descent.
Runners will meet at Goring Village Hall between 0700 and 0840 on race day. There will be a race briefing at 0840 and the race will start at 0900 from the road adjacent. Final Cut Off is at 2200.