The Upper Ten Mile River Run in Colorado offers a thrilling and challenging adventure for experienced whitewater enthusiasts. This section of water contains several technical rapids and obstacles, including the Class IV Gore Rapid, which features a steep drop and powerful currents. The river run difficulty is rated as Class III-IV, with high water flows potentially increasing the challenge. The best time of year to float this section is typically from May to early July, with recommended CFS levels ranging from 500 to 1,500. It is important to note that this section of the river is not recommended for beginners or inexperienced paddlers.