Maquoketa Caves State Park to reopen Thursday 7/27/2022 2:41:00 PM View Count 4130 MAQUOKETA, IA -- Maquoketa Caves State Park will reopen for day use at 10:00 a.m. on Thursday, July 28. The campground will remain closed until further notice. All campers with reservations through Sunday, July 31 have been notified and refunded.