Learn more about the types of fish located within the Bighorn Canyon National Recreation area. Note: This page does not provide the fishing regulations. For fishing and boating regulations please see the main fishing page. Boating. There is a boat launch on the south side of the Afterbay. Motor boating is allowed on the reservoir with the exception of the area closest to Yellowtail Dam (beyond the orange log boom near the historic Bighorn Head Gate). Restricted areas are also identified and delineated by signs or boat restraining systems.