Limestone secrets

Fort Snelling State Park

Noon-1 p.m. Friday

• Rocks and minerals deposited during the glacial period reveal area history. See how humans, too, changed the landscape. (612-725-2724; mndnr.gov/fortsnelling)

Candlelight outings

Luce Line State Trail

5-8 p.m. Friday

• A milelong trail for walkers will be alight with candles. Stay for campfires and refreshments. Park off Vicksburg Lane. (651-231-6968; mndnr.gov/luceline)

Lake Carlos State Park

6-9 p.m. Saturday

• Snowshoe, ski or just hike, depending on snow. Refreshments will be part of the fun. (1-320-852-7200; mndnr.gov/lakecarlos)

Winter falls stroll

Gooseberry State Park

11 a.m.-noon Saturday

• Learn history and geology on a walk to Upper Falls. Cleats are recommended. (1-218-595-7100; mndnr.gov/gooseberry)

Ski lessons

Hyland Lake Park Reserve

9:30-11 a.m. Saturday

• Learn basic skate skiing skills: push off, weight transfer, glide and polling. Techniques for flats and hills. Prior classic skiing experience is recommended. Cost is $28 ($45 with ski rental). Call 763-559-6700 for reservations or go online to bit.ly/skateelm.

Elm Creek Park Reserve

9:30-11 a.m. Saturday

• For children age 6 to 8, an introduction to classic cross-country skiing through fun activities and games. Cost is $17 ($25 with rental). Call 763-559-6700 to make a reservation, or go online to bit.ly/kidelm.

Elm Creek Park Reserve

Noon-1:30 p.m. Saturday

• For ages 9 to 12, an introduction to cross-country skiing through fun activities and games. Cost is $17 ($25 with rental). Call 763-559-6700 to make a reservation, or go online to bit.ly/skielm.

Marsh march

Coon Rapids Dam Regional Park

1-3 p.m. Saturday

• Explore the frozen wetland and discover what lives in and visits the marsh during winter. Refreshments provided. Ages 11 years and younger must be accompanied by an adult. Cost is $5. Call 763-694-7790 or go online to register. (bit.ly/marshdam)