Its part of a program called "Healthy Parks, Healthy People" ... celebrating National Park Week and Earth Day.
For the week, the park has many events lined up, meant to encourage visitors to participate in physical activities including walks with rangers, a film festival and a trash pickup event. However, fees for camping and other activities still apply.
Events and activities include:
10:30 a.m. to 2 p.m.: Earth Day Village Celebration, Yosemite Village Mall Celebration, children's tent and earth-friendly product fair.
11 a.m. to 1 p.m.: National Volunteer Day trash pick-up.
5:30 to 6:45 p.m.: Spring Twilight Stroll, a focus on poetry and parks.
8 to 9 p.m.: Earth Day Theater Live!: The Spirit of John Muir
8 to 10 p.m.: "John Muir in the New World" program
8 to 9 p.m.: "Green Fire: Aldo Leopold and a Land Ethic for Our Time"
8 to 9 p.m.: "The Thin Green Line"
Wednesday, April 20
8 to 9 p.m.: "Nature Notes and Beyond"
Thursday, April 21
8 to 10 p.m.: "Josh Muir in the New World"
Friday, April 22 (Earth Day)
9 a.m.: Stewardship project
2 to 5 p.m.: Earth Day bike ride
7 to 9 p.m.: Earth Dance Film Festival
Saturday, April 23
10 a.m.: National Junior Ranger Day walk
Noon to 4 p.m.: Exploration Fair at Happy Isles
2 p.m.: Wee Wild Ones
3 p.m.: Junior Ranger Walk
8 to 9 p.m.: National Parks in the Sky
Sunday, April 24
8 to 9 p.m.: "The National Parks: This is America" For more information, visit www.nps.gov or call (209) 372-0200.