Berkshire Trails Nordic Ski Race — 5k and 10k races take place today at Notchview Reservation, Route 9, Windsor; the start time is 10 a.m. Bad weather cancels. For more information call 597-2425.
Late Winter Ecology Snowshoe at Windsor James State Forest — Arcadia Wildlife Sanctuary sponsors a three-mile roundtrip moderate snowshoe outing today from 10 a.m. to 1 p.m. Fee: $16. Preregistration required; call 584-3009 or email firstname.lastname@example.org.
Marble Brook Hike — Kestrel Trust sponsors a natural history hike with Dave Herships in Florence today from 1 to 3 p.m. Call to preregister. Go to Kestreltrust.org or call 549-1097.
Pedal to End Cancer — Indoor cycling event to benefit the American Cancer Society takes place Sunday from 9 a.m. to noon at the Northampton Athletic Club, 306 King St., Northampton. Join for 1, 2, or 3 hours as an individual or part of a team. Fee: $25. For more information go to www.pedaltoendcancer.org.
Snowshoeing for Seniors — Guided beginners and intermediate group snowshoeing for ages 60 and up takes place Monday and Wednesday, from 10 a.m. to 2 p.m., at the DAR State Forest, Route 112, Goshen. Instruction, snowshoes and poles will be provided. Free. For more information call 527-8980.
What Do Squirrels Do? — An indoor/outdoor program with animal behaviorist Sarah Partan will be held March 9 from 10 a.m. to noon, at the Hitchcock Center for the Environment, 525 S. Pleasant St., Amherst. Free. Preregistration required; call 256-6006.
Frosty Yoga, Toasty Snowshoe at Mount Warner — Trustees of Reservations will sponsor a hike and yoga session with Ananda Yoga Studio at Mount Warner in Hadley on March 10, from noon to 3:30 p.m. Fee: $20, plus $10 snowshoe rental. Preregistration required; call 532-1631 or email email@example.com.
Sunday Snowshoe Trek — The Trustees of Reservations will sponsor a guided snowshoe hike on March 17 from 10 a.m. to noon, at Little Tom Mountain, Mountain Park Road, off Route 5 (I-91 overpass), Holyoke. Free admission; $10 for snowshoe rental. Preregistration required; call 532-1631 or email firstname.lastname@example.org