Cape Henlopen State Park in Delaware is open from 8 am until sunset so you have plenty of time to enjoy the sights. From April to October, the park office is open seven days a week. The rest of the year, you can get to the park office between Monday and Friday from 8am until 4pm. For residents, there is a $5 entry fee and a $10 entry fee for non-residents. Off-season is free admission.