The Barrel Springs River Run on the Colorado River in Colorado is a Class III-IV whitewater section with rapids such as Skull and Wall Slammer. This run can be challenging for beginners and requires experienced rafting skills. The best time of year to float this section is during the spring and early summer months when the water level is high, with recommended CFS levels ranging from 2,000-5,000. Obstacles to watch out for include tight turns, large rocks, and strong currents, so it's important to have a knowledgeable guide and proper safety equipment.