170 miles (twice) and 150 miles once, all fixed (have no free side). Ditto on the money, spare tube, water, and Gu or other energy enhancers, pump, & regular bike stuff. I also bring some arm warmers and light clothing because it takes awhile to ride long distances. Ride smartly and let the bike do the work, if you try to work it, you'll run out of steam. Don't think about the mileage, just ride and enjoy. Above 50 miles and you'll know if you have the right saddle or not, same thing with the clothing/shoes. You can endure, but you might be changing out afterward.