The 3.3-mile out and back loop at Ryton Pools Country Park means your race can be just over 5k or, given the relatively flat nature of the course, potentially 49.5 miles! You decide how many laps you are going to do on the day within the 6-hour time limit. If you're looking to cover a marathon distance you'll need to complete 8 laps (26.4 miles) and a half marathon will be 4 laps (13.2 miles).

In summary, it's relatively flat with a few little rises that you might not notice much on the first lap, but you might do at the end of 6 hours! Underfoot is crushed stone with a very small section of single track and a few areas that are a little looser than others. It is a very runnable course.

http://www.bigbearevents.net/big-bear-challenge.html