Spend an hour or a day–or anything in between–trail running with your closest running friends and nemeses; very low key. Distance options: Approx. 5 mile loops; run as many as you please, until you can’t feel your limbs, or until you can’t give any more blood. Course has variety of flat, steep, rolling, wide, double-wide, and single-track trails. Slush, slop, mud, ice, poop (horse variety), thorns, blood, views, guaranteed.