Complex sentence: Numerous developed boat launch sites provide access to rivers for whitewater enthusiasts, and Dagger Falls is the primary launching site for visitors to the Middle Fork of the Salmon River and Frank Church River of No Return Wilderness.
Split into simpler sentences: Numerous developed boat launch sites provide access to rivers for whitewater enthusiasts. The Dagger Falls boat launch is the primary launching site for visitors to the Middle Fork of the Salmon River and Frank Church River of No Return Wilderness.