If you like a good challenge sign up for a Survivalrun.

This sport will most certainly test all your survival instincts from absolute insensibility for, and resistance against all weather circumstances. Extreme frost, rain, black ice, hail, wind, cold or heat nothing brakes the present survival sportsman...

The Dutch Survival Association (Survival bond) is an association which oversees the many events  hosted in Holland.

Survivalruns are organised in The Netherlands and Belgium.