The Dirty Kanza is a true personal challenge. Multiple courses are available from 50-200 miles (plus the 350 mile DKXL which is invite only). The most popular distance is 200 miles. Be prepared for heat, wind and potential sticky mud as it can go on with thunderstorms during the day. It‘s good to ride with top tube bags (bolt-on is top) and new solid tires with sidewall shield to prevent slit tires. If it gets muddy, loads of tire cleareance and simple 1x drivetrains come in handy.