The El Rito Azul-Blue Lake run in Colorado is a challenging and exciting whitewater experience for experienced kayakers and rafters. The ideal streamflow range for this run is between 600-1,000 cfs. This segment of the Conejos River above Platoro Reservoir to the upper reach of Platoro Reservoir is rated Class IV-V, and has a total mileage of approximately 10 miles.

This section of the river is characterized by several notable rapids and obstacles, including the "Hole-in-the-Wall," "S-Box," "The Notch," and "The Narrows." These rapids require advanced-level skills, and should only be attempted by experienced boaters.

There are specific regulations that must be followed when boating in this area. All boaters must wear personal flotation devices, and there is a strict limit on the number of people allowed on rafts. Additionally, boaters must obtain a permit to access the area, and must follow all rules and restrictions outlined by the Platoro Reservoir Recreation Area.