Clearwater’s Great Hudson River Revival, the oldest environmentally conscious outdoor fest of its kind in the country, returns this Father’s Day weekend to Croton Point Park in Westchester. Founded by Pete Seeger in 1966, Clearwater is a Poughkeepsie-based nonprofit seeking to protect the Hudson through education and public advocacy. The Revival brings together a diverse array of performers, including jugglers, clowns, acrobats, puppet theater performers, storytellers, and over 50 musical acts on multiple stages. Headlining this year’s festival are alt-rockers Cowboy Junkies. Also appearing will be Buffy Ste. Marie, Bruce Cockburn, Leo Kottke, Paul Winter, and the Bruce Molsky Band with Tony Trischka. Limited camping is available on-site. The 2007 Clearwater Music and Environmental Revival Festival will take place on June 17 and 18, from 10am to 8:30pm, at Croton Point Park in Croton-on-Hudson. (800) 67-SLOOP; www.clearwaterfestival.org.