1 Bird-watching trek
Minnesota Valley National Wildlife Refuge, March 22 and 24, 8-10:30 a.m.
The refuge is hosting a series of bird-watching treks this spring, each exploring a different unit and a different facet of spring migration. This installment convenes at Old Cedar Avenue in Bloomington for a guided hike in search of migratory warblers. More information: www.fws.gov/refuge/ minnesota_valley/events.html.
2 Orienteering clinic
French Regional Park, March 22, noon-3:30 p.m.
Navigate the woods the old-fashioned way — with a map and compass. Beginners are invited to classes at noon or 12:45 p.m. A special session for teachers and group leaders is slated for 1:30 p.m. Those with orienteering experience are welcome any time between 12:15 and 3:30 p.m. Course closes at 3:30 p.m. Ages 6-plus. $13. Registration required; 763-559-6700. More information: www.threeriversparks.org.
3 Maple syruping in your back yard
Fort Snelling State Park, March 22, 1-2:30 p.m.