Golden River Sports sells and rents river gear, including boats, paddles, helmets, and life jackets. They also sell inner tubes for $20 (small) and $30 (large).
Every Thursday evening from May 1 through August 31 they host a demo night on Clear Creek, so you can try their equipment and see what you like! Look for them at 1300 10th Street on Thursday evenings. Call the store for details.
Golden River Sports