Good question. Might be worth a phone call.
From CPW's website:
Elevenmile Canyon, below the Eleven Mile dam and operated by the US Forest Service may have closures in place due to high water releases from the Eleven Mile dam. Please contact the US Forest Service office in Fairplay at 719-836-2031 for the most current information regarding their properties.
GARNA’s mission is to foster stewardship of the resources of the greater Arkansas River region through education, volunteerism and experiences. https://garna.org