The Gravel Grinder is essentially three races in one. The Easy 18 mile race is flat and easy, a great race for beginners or even the kids in the family. The Fast 40 mile race is a gravel race best suited for Cross bikes. The seasonal roads have been removed for this route. Expect lots of fast gravel mixed with some tough climbs. The Sadistic 60 mile race is for the person who wants a true challenge. You get five monster climbs, lots of fast gravel roads, multiple sections of tough seasonal roads which have sand, mud and rocks and also a white knuckle descent. Whatever bike/tire you choose it will be the wrong one at some point. This route will test your mental sanity.