Piney Orchard Nature Preserve is in Odenton, and unfortunately is a resident only fishing area. No boats, and strictly catch and release. It is south of 175 on Telegraph Road, until you get to Sandy Walk Way, follow that all the way to the end and then there's a short walk to the lake. It has some serious fish in it though, I lost about a 6 pounder yesterday, fishing a lizard on a wacky rig.