MDHillSlug, the minimum requirement is 150.00 which is required when you show up for the event. The brochure states you pay the registration fee of 40.00 and the ride minimum must be met on the day of the event. If you excede the minimum, for every 25.00 over your name goes in a special drawing bucket for door prizes. I had 2 co-workers that gave me a large amount which totally blew me away so i've met my requirements to do the event on Sunday. I plan on using the inhouse emails at work to give everyone that donated an update on my ride when I return back to work so they know their donations were greatly appreciated. I am looking forward to doing this ride. The route looks fairly easy (meaning minimal hills and not mts. to climb), i've rode bits and pieces of the 100 miles at varoius points with friends from that area. There are like 10 rest stops along the way with a "meal" at mile 50 and at the end of the ride. The extended forcast calls for temps in the low 70's, and cloudy so far, for me that is a plus. Good luck on your ride and hope you have fun. Let us know how it goes and Ill also post when it's over.