Organization: National Park ServiceLocation: 1849 C St NWWashington, DC, 20240United StatesSee map: Google MapsPhone:202-208-6843 2025 Free Entrance Days in the National ParksDates: 04/19/202506/19/202508/04/2025Show more datesHide these dates09/27/202511/11/2025Time: See website for details. Organization: Alpengirl CampLocation: 214 E Mendenhall StBozeman, MT, 59715United StatesSee map: Google MapsPhone:406-570-6312 Alpengirl Adult Women's AdventuresDates: 08/20/202508/21/202508/22/2025Show more datesHide these dates08/23/202508/24/202508/25/202508/26/202508/27/202508/28/202508/29/202508/30/202508/31/202509/01/202509/02/202509/03/202509/04/202509/05/202509/06/202509/07/202509/08/202509/09/202509/10/202509/11/202509/12/202509/13/202509/14/202509/15/202509/16/202509/17/202509/18/2025Time: 8:00AM Location: Drayton Plains Nature Center2125 DenbyWaterford, MI, 48329United StatesSee map: Google MapsPhone:248-674-5441 Earth Day Celebration & Nature Hikes | Drayton Plains Nature CenterDates: 04/19/2025Time: 10:30 AM - 2:00 PM Organization: Arboretum DetroitLocation: 5300 Elmwood StDetroit, MI, 48211United StatesSee map: Google Maps Earth Day Tree Planting | Arboretum DetroitDates: 04/26/2025Time: 3PM - 6PM Organization: Detroit ZooLocation: 8450 W. 10 Mile Rd.Royal Oak, MI, 48067United StatesSee map: Google MapsPhone:248-541-5717 GreenFest 2025 at the Detroit ZooDates: 04/12/202504/13/2025Time: 9 am - 3 pm Organization: Stony Creek Nature CenterLocation: 4300 Main Park RoadShelby Township, MI, 48316United StatesSee map: Google MapsPhone:(586) 781-9113 Nature at Night - Stony Creek MetroparkDates: 08/08/202509/12/202509/26/2025Show more datesHide these dates11/14/202512/19/2025Time: Time varies by date Organization: Johnson Nature CenterLocation: 3325 Franklin RoadBloomfield Hills, MI, 48302United StatesSee map: Google MapsPhone:248-341-6485 Whimsical Woodlands - Johnson Nature CenterDates: 04/27/2025Time: 10AM - 4PM Organization: Matthaei Botanical Gardens & Nichols ArboretumLocation: 1800 N. Dixboro RoadAnn Arbor, MI, 48105 United StatesSee map: Google MapsPhone:(734) 647-7600 Wonder Walks at Matthaei Botanical GardensDates: 04/06/202504/09/202504/13/2025Show more datesHide these dates04/23/202504/27/202505/04/202505/14/202505/18/202505/28/2025Time: Wednesday 5:30 | Sundays 1:00PM Visiting Sedona, AZ