Nature hikes, northern lights, loons calling in the dark, incredible sunrises are all on the agenda.     The irresistible call of spring. The north woods of Minnesota are reborn - and you'll feel that way, too! Wildlife reappears. Wildflowers present a colorful display. Boats and pontoons align the shore. As the waters open, guests bring in fish by the stringer full. (The fishing at Mantrap Lake is legendary!) Golf clubs swing at area courses and the smell of outdoor barbecues mingles with the fresh forest air.   Mantrap Lodge 20725 Jewel Drive 20725 Jewel Drive, Park Rapids, MN 56470 218-732-5405 1-800-424-0901 mantraplodge.com