Earth Day Celebration, 10 a.m. to 3 p.m., Cortez Street, adjacent to Yavapai County Courthouse Plaza. Thirty-two educational booths on water, solar, food and more.
Wildland Fire Expo 2017, 10 a.m. to 3 p.m., also along Cortez Street in downtown Prescott. See state-of-the-art firefighting equipment, antique fire engines and more.
Prescott Creeks Granite Creek Cleanup, 9 a.m. to noon, various locations, including Granite Creek, Greenway Trail, West Granite Creek Park, Watson Woods. prescottcreeks.org/programs/education-and-outreach/granite-creek-cleanup/)
March for Science, 3 p.m. on the north side of the courthouse, is a sister event to the one taking place in Washington, D.C., and other communities nationwide on April 22.
The Cache In Trash Out (CITO) clean-up and geocache event, 8:30 to 10 a.m. in the Lynx Lake Recreation Area and along Walker Road. geocaching.com (search for Prescott, AZ).