Summary
The ideal streamflow range for the creek is between 500 and 1000 cfs, which typically occurs during the spring runoff season. The creek is rated as a Class IV-V river, with steep drops and challenging rapids. The segment mileage for the creek is approximately 14 miles.
Some of the specific rapids and obstacles on Twelvemile Creek include the "Big Falls," a 25-foot waterfall, and the "Wall," a narrow chute with a sharp turn that requires precise maneuvering. Other notable features on the creek include "S-Turn," "The Crack," and "The Slot."
To ensure safety and preserve the natural environment, there are specific regulations in place for the area. The use of motorized watercraft is prohibited on the creek, and all visitors are required to obtain a permit from the Bureau of Land Management before accessing the area. Additionally, visitors are encouraged to practice Leave No Trace principles and to avoid damaging or disturbing the surrounding wildlife and vegetation.
Overall, Twelvemile Creek offers a challenging and rewarding whitewater experience for experienced paddlers, but should only be attempted with proper equipment and training.