Paddleboard lesson

Cleary Lake Regional Park

5-7 p.m. Friday

Head to Prior Lake for a lesson. Equipment provided. The paddleboards available at Three Rivers Park District have a manufacturer’s recommended weight limit of 220-250 pounds. Beginning participants at or above the manufacturer’s recommended weight limit may experience difficulty standing or balancing while on the boards. Cost is $35 and reservations are required. Call 763-559-6700 and reference activity number 424511-01. For ages 14 and older. There is a similar session from 4-6 p.m. Saturday. Call to reserve a slot, and reference activity number 424511-02. (threeriversparks.org)

Women’s nature hike

Fort Snelling State Park

9-10:30 a.m. Saturday

Join a park naturalist for a morning hike and learn how the flood plain forest transitions from a hot summer to a cold and bitter Minnesota winter. (612-725-2724, www.mndnr.gov)

Family canoeing

Cleary Lake Regional Park

1-3 p.m. Saturday

Learn the basics of canoeing from safety to paddle strokes. Equipment provided. Cost is $15, and reservations are required. Call 763-559-6700 and reference activity number 424501-13. Children 17 years and younger must be accompanied by a registered adult. (threeriversparks.org)

Geocache challenge

Interstate State Park

10-11 a.m. Saturday

 Are you a geocacher itching for a new challenge? Put your geocaching skills to the test by using clues to locate creatively camouflaged caches the size of a glue stick. GPS units and a refresher on their use will be provided. Meet at the park office (campground entrance of the park). (651-465-5711, www.mndnr.gov)

Fossil field trip

Whitewater State Park

10-11 a.m. Saturday

 On this trip you will find, and can keep, fossils of plants and animals. Bring transportation. The site is 9 miles from the park. (1-507-932-3007, www.mndnr.gov)

Build a bison

Minneopa State Park

7-8 p.m. Saturday

Find out how bison differ from buffalo, how they live in harsh conditions and how the arrival of Europeans affected them. Meet at the group campground. (507-389-5464, www.mndnr.gov)

Antique train ride

William O’Brien State Park

10:30 a.m.-3:30 p.m. Sunday

Walk a mile to the train tracks, then board an antique train with a naturalist and a conductor who will take you on a tour of the St. Croix Valley. Meet at the park visitor center. Cost is $15 for adults, $10 for kids under ages 4 to 16, and free for children age 3 and younger. (651-433-0500)