Starting at the beautiful 4R Ranch Vineyards and Winery, this tough gravel adventure pushes you through the rugged, hilly landscape of North Texas Hill Country with breathtaking views—definitely one for experienced riders seeking a real challenge. You'll pick your distance (100 miles, 100 kilometers, or 45 miles) on a self-supported course where you handle your own route-finding and repairs, though you'll have marked trails and neutral water stations to help you along the way. This iconic Spinistry event has been a staple since 2010, and Club Spinistry members get first dibs on registration plus sweet discounts.