Of Oklahoma's many great crappie lakes, one of its finest is so obvious it eludes the notice of many anglers. Lake Hefner is a 2,580-acre water supply reservoir on the fashionable northwest corner of Oklahoma City. Better known for the legions of roller-bladers that skate along its bike trail, Hefner supports a surprisingly diverse fishery containing healthy populations of several species including largemouths, smallmouths, walleyes and saugeyes. In April, however, crappies are the main attraction, at least as far as fishing is concerned. This month, egg-laden females will move shallow to spawn in the rocks ringing the shoreline, making the fish easy to catch from both boat and shore. The hot spots can get crowded, even during the middle of the week, but the fishing is good enough that nobody seems to mind sharing close quarters. Contact: Oklahoma Department of Wildlife Conservation (405-521-3851).