Many off roaders do Long Distance Walking events as either training for greater things or for their own merit as long distance challenges. Most of them allow runners to take part in addition to walkers.
This morning I struggled around the short alternative of the Hebden (a route as you might suspect, that circumnavigates Hebden Bridge). My performance is irrelevant (and unmentionable), but I would like to encourage people who have never tried a LDWA* event to give it a go.
The organisation on today's event was superb. Food and drink at checkpoints that wouldn't be out of place at a Palace garden party; encouragement from marshalls and helpers all the way and to cap it all hot food with pudding at the finish. All this for seven quid!!
*LDWA - Long Distance Walkers Association (http://www.ldwa.org.uk)
For comparison, an organiser of a so called "adventure race" in the Peak District is charging £30 for the privilege of running and biking across bits of the Peak with a bit of roap work thrown in (bondage on the go as it were). And all you get at the finish is a few dry biscuits and a drink.