Do This Now: Editor-selected events at state, regional and local parks

1 Geocaching 101

William O'Brien State Park, April 26, 10:30 a.m.-noon

Geocaching expert Andy McCracken offers a free lesson on using GPS devices to find hidden treasures in Minnesota state parks. A limited number of GPS units are available for eventgoers to borrow. Reserve yours by calling 651-433-0500. More information: www.mndnr.gov/ptcalendar.

2 Bird-watching trek

Minnesota Valley National Wildlife Refuge, April 26, 7-9:30 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 waterfowl, thrushes and early spring warblers. More information: www.fws.gov/refuge/minnesota_valley/events.html.

3 Prairie butterfly garden class

Join Joel Dunnette from Zumbro Valley Audubon for a lesson on planting your own prairie wildflower garden. These gardens are known for blooming throughout the growing season. Plus, they help preserve the state's natural heritage. Free seedlings available. More information: 1-507-932-3007 or www.mndnr.gov/ptcalendar.

4 Bird-watching trek

Minnesota Valley National Wildlife Refuge, April 29, 7-9:30 a.m.