Photography tips

Whitewater State Park, 11 a.m.- noon Saturday

Learn how to take better nature photographs from Rochester Post-Bulletin outdoors writer-photographer John Weiss and see some of his favorite shots. (507-932-3007, mndnr.gov)

Nature hike

Fort Snelling State Park, 1-2:30 p.m. Saturday

Winter can last a long time in Minnesota, but come to Fort Snelling State Park to beat your cabin fever. We'll explore the trails and look for signs of spring. Dress for the weather and meet at the visitor center. (612-725-2724, mndnr.gov)

Maple syruping

Lake Maria State Park, 11 a.m.-2 p.m. Saturday and Sunday

Come and learn about the process of making real maple syrup. This includes tapping the maple trees, cooking the sap and the finishing process. Taste the final product. The demonstration is ongoing, so arrive anytime between 11 a.m. and 2 p.m. Meet at the visitor center and follow the signs. Note that you may encounter snowy, muddy or wet conditions on the short hike to the tapping area. (763-878-2325, mndnr.gov)

Trail race

Lake Rebecca Park Reserve, 8 a.m. April 16

Preregistration online at a discount ends at midnight Friday for the Trail Mix running races through prairie, woods and near wetlands at the park in Rockford. There are three races that are part of Trail Mix: a 25 kilometer, a 50K and a 50K team run (four racers). Money from the Trail Mix will help Three Rivers Park District buy equipment for its adaptive sports programs. Go online to bit.ly/trailmx to sign up. Mail-in registration must be postmarked by Wednesday. Same-day registration is available. (763-559-6700)

GPS how-to

Baker Near-Wilderness Settlement, 3:30 p.m.-5:30 p.m. Sunday

Learn how to use a Global Positioning System (GPS) unit and search for hidden geocaches. Equipment provided. Children 17 years and younger must be accompanied by a registered adult. Cost is $5. Reservations required. Call 763-694-7856.

Penny hike

Lowry Nature Center, 1 p.m. Sunday

Pick a trail owing to your coin toss, and explore spring flowers and markers of the season. (763-694-7650, threeriversparks.org)