Sam Stowe campground and Castle Rock campground are now fully open for the season, with all water turned on and bathrooms open. Sam Stowe Campground has 7 full hookup site available, which are possible to reserve May-September. Winter months the site is first come, first serve. Castle Rock campground has 30 RV/Tent sites and is now open for the season, taking reservations for May-September as well. Please contact the park for more information. The visitor center/museum is open 7 days a week 9 a.m. to 5 p.m. Come visit our new exhibits and museum layout!