There are many miles of hiking to be done in OMSP. In general there are not too many spectacular views or anything (with the exception of King's chair) but the trails are good and not crowded. The mountain bike trail is world class. The swimming beach is pretty pathetic--it gets crowded in summer and the water gets way too warm. Early in the year (Mar-May) it is nice though. They charge $3 per person which seems a bit high if you come, say, four in one car.
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