Kent’s Who’s Your Mama? Festival — 5 to 10 p.m. Friday, a film festival in the Kiva Auditorium at the Kent State University Student Center. Block party on East Main Street between Water and Depeyster streets, 11 a.m. to 5 p.m. Saturday with green vendors, alternative energy displays, music, children’s poetry and a parade. Continues through Monday. Presented by Standing Rock Cultural Arts. 330-673-4970 or www.whosyourmama.org.
Medina County Park District — 10 a.m. to 4 p.m. at the Buffalo Creek Retreat off Hubbard Valley Road in Guilford Township. Earth-friendly exhibits, fishing, children’s activities, food and more. Free. Additional free parking at Hubbard Valley Park with a shuttle to Buffalo Creek. 330-722-9364 or www.medinacountyparks.com.
Stark County’s Towpath Trail cleanup — 9 a.m. to noon starting at the trailhead at 5400 Butterbridge Road NW, Jackson Township. Also being cleaned up are the Olde Muskingum Trail, the banks of the Tuscarawas River and the Ohio & Erie Canal. Organized by the Stark County Park District. Bring work gloves and drinking water. Wear boots or waders to go in the water and sturdy hiking shoes on the trail. Dress for the weather; old clothes recommended for muddy conditions. 330-409-8096 or www.starkparks.com.
The Wilderness Center — 8 a.m. to 4 p.m. at 9877 Alabama Ave. SW in Sugar Creek Township. Activities include bird walk at 8 a.m., trail cleanup and pulling invasive plants 9 a.m. to 4 p.m., backpacking-hiking demonstration 9 a.m. to 1 p.m., Foto Fest 9 a.m. to 4:30 p.m. (continues on Sunday), program on green burials and story walks 9 a.m. to 4 p.m., planetarium show at 2 p.m. Cleanup volunteers, contact Vicki Shoenfelt in advance. 877-359-5235 or www.wildernesscenter.org.
Akron Zoo’s Party for the Planet — 11 a.m. to 4 p.m. at 500 Edgewood Ave. Earth-friendly vendors and exhibitors, crafts and entertainment by Michael Ray’s Cirque de Papier. Supported by City Scrap and Salvage, Ohio Connections Academy and the Lube Stop Inc. Admission $6, parking $2. 330-375-2550 or www.akronzoo.org.
Quail Hollow State Park — 1 to 5 p.m. at 13480 Congress Lake Road NE, Lake Township. Program on turtles at 1 p.m. and woodland walk at 2 p.m. Visit birds of prey, display by the Quail Hollow Camera Club. 330-877-6652 or www.quailhollowpark.org.
Kent State University Stark Campus — 1 to 4 p.m. at the Campus Center lot and the pond area at 6000 Frank Ave. NW, Jackson Township. Exhibits, demonstrations, nature walks, games, mock fossil digs, entertainment and giveaways. 330-244-3251.
EarthFest 2013 — 10 a.m. to 5 p.m. at Cuyahoga County Fairgrounds off Bagley Road in Berea. Sponsored by the Cleveland-based Earth Day Coalition with environmental displays, music, art, refreshments, walking tours of eco-projects at Baldwin-Wallace University, flea market. $5 ages 12 or older, $3 ages 2 to 11. Free if you ride a bike or take the Metro RTA EarthFest shuttle to the fairgrounds. 216-281-6468 or www.earthdaycoalition.org.
Party for the Planet — 10 a.m. to 4 p.m. at Cleveland Metroparks’ Zoo, 3900 Wildlife Way, Cleveland. $2 off regular zoo admission. Includes animal demonstrations, Professor Wylde’s Animal Show and zoo plantings. The zoo is collecting aluminum cans and used cellphones. 216-661-6500 or www.clemetzoo.com.
Cuyahoga Valley National Park — 1 to 4 p.m., help restore native habitat by planting trees. The location will be disclosed when you register. For ages 7 or older. 330-657-2299 or firstname.lastname@example.org.
Cuyahoga Valley National Park — 6 p.m. at the Ledges Shelter off Truxell Road in Boston Township, ranger-led hike on the Ledges Trail. Dress for the weather and wear sturdy boots on the 2.2-mile moderately paced hike.
Family labyrinth — 3 to 5 p.m. at University of Mount Union’s John T. Huston-Dr. John B. Brumbaugh Nature Center. The center is off Dan Street off state Route 183 six miles south of Alliance in Washington Township. 330-823-7487.
Hudson — 6:30 p.m. program on Lake Erie and Cuyahoga River at the Hudson Library and Historical Society, 96 Library St. Speakers include Eugene C. Braig IV of Ohio State University and John Peck of the University of Akron. The Northeast Ohio Regional Sewer District will explain stream monitoring programs. 330-653-6658, ext. 1010, or www.hudsonlibrary.org.