Kelso - Kelso boasts a variety of activities any time of the year, and the reservoir hosts a multitude of them. You can swim, canoe, or try your hand at stand-up paddle boarding during the warmer months of the year. For those who prefer to stay dry, enjoy a peaceful walk on the boardwalk around the reservoir. Note: Kelso Beach is open by reservation only. Book under Kelso Main Entrance. Visit duration times may be extended depending on capacity.