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Anthony Chabot
Deer Valley
Antioch/Oakley
Ardenwood
Bay Point
Big Break
Bishop Ranch
Black Diamond Mines
Briones
Brooks Island
Browns Island
Brushy Peak
Carquinez Strait
Castle Rock
Claremont Canyon
Contra Loma
Coyote Hills
Crockett Hills
Crown Beach
Cull Canyon
Del Valle
Diablo Foothills
Don Castro
Dry Creek Pioneer
Dublin Hills
Dumbarton Quarry Campground
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Garin
Hayward
Huckleberry
Judge John Sutter
Kennedy Grove
Lake Chabot
Las Trampas
Leona Canyon
Little Hills
Martin Luther King Jr.
Martinez, see Radke Martinez
McLaughlin Eastshore
Miller/Knox
Mission Peak
Morgan Territory
Ohlone Wilderness
Oyster Bay
Pleasanton Ridge
Point Isabel
Point Pinole
Quarry Lakes
Radke Martinez
Reinhardt Redwood
Roberts
Round Valley
Shadow Cliffs
Sibley
Sobrante Ridge
Sunol
Sycamore Valley
Temescal
Thurgood Marshall
Tilden
Tilden Botanic Garden
Tilden Nature Area
Vargas Plateau
Vasco Caves
Waterbird
Wildcat Canyon
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May 2025
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Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
27
28
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30
1
2
3
Historic Days
10:00am
-
4:00pm
Historic Days
10:00am
-
4:00pm
Leona Canyon Native Plant Restoration - Cancelled
9:00am
-
12:00pm
Birds and Blooms
9:00am
-
11:00am
May Flowers
9:30am
-
11:00am
More Events >
4
5
6
7
8
9
10
Garin Trails Challenge Hike
9:00am
-
11:30am
Butterfly Spring: McCosker Loops
9:00am
-
12:30pm
Bedrock Blooms
9:00am
-
12:30pm
More Events >
Monday Birding: Shell Ridge
8:00am
-
11:00am
Kayaking Big Break
9:00am
-
12:00pm
Big Break Littles
10:00am
-
11:00am
May Flowers
10:00am
-
12:00pm
Big Break Littles
10:00am
-
11:00am
The Over-the-Hills Gang: Fernandez Ranch
10:00am
-
12:30pm
Hikes for Tykes: Lake Chabot
10:30am
-
11:45am
Toddler Time
10:30am
-
11:45am
Fish Feeding
3:00pm
-
3:30pm
Historic Days
10:00am
-
4:00pm
Story Time
10:30am
-
11:00am
Garden Helpers
3:00pm
-
4:00pm
Scorpion Searching
8:00pm
-
9:30pm
Boat to Brooks
8:30am
-
3:30pm
Saturday Stroll: Elsie Roemer
9:00am
-
11:30am
Canine Capers
9:00am
-
11:00am
More Events >
11
12
13
14
15
16
17
Vasco Caves Tours
9:00am
-
1:00pm
Art of Tataki Zomé
9:00am
-
1:00pm
Boat to Brooks
9:30am
-
4:30pm
More Events >
Monday Birding: Five Canyons
8:00am
-
11:00am
Big Break Homeschool
10:00am
-
11:30am
Outdoor Discoveries! OHLONE PEOPLE
10:30am
-
12:00pm
Big Break Homeschool
1:00pm
-
2:30pm
Mini Miners
10:00am
-
11:00am
Sea Squirts: Turtle Time
10:30am
-
11:45am
Fish Feeding
3:00pm
-
3:30pm
Historic Days
10:00am
-
4:00pm
Historic Days
10:00am
-
4:00pm
Story Time
10:30am
-
11:00am
Trail Maintenance Volunteer
3:00pm
-
8:00pm
Trail Maintenance Volunteer
7:30am
-
8:00pm
Alameda Walks!
9:00am
-
11:15am
Archery Introduction
9:30am
-
11:30am
More Events >
18
19
20
21
22
23
24
Trail Maintenance Volunteer
7:30am
-
2:00pm
Binos and Boardwalks
8:30am
-
9:30am
Butterfly Spring: Bay Area Ridge Trail and Quarry Trail
9:00am
-
12:30pm
More Events >
Monday Birding: Briones Lagoons
8:00am
-
11:00am
Lakeside Littles
10:00am
-
11:00am
Kayaking Big Break
9:00am
-
12:00pm
Hikes for Tykes: Roberts
10:30am
-
11:45am
Toddler Time
10:30am
-
11:45am
Tilden Tots
10:30am
-
11:30am
Fish Feeding
3:00pm
-
3:30pm
In the Company of Goats
3:30pm
-
4:30pm
Historic Days
10:00am
-
4:00pm
Hike and Storytime: Tilden Nature Area
11:00am
-
12:30pm
Historic Days
10:00am
-
4:00pm
Story Time
10:30am
-
11:00am
World Turtle Day
2:00pm
-
3:00pm
More Events >
Discovery Club
9:00am
-
11:00am
Poops and Paws
10:00am
-
12:00pm
Rail Fair Advance Tickets
10:00am
-
4:00pm
More Events >
25
26
27
28
29
30
31
The Early Birder Sees the Bird an Intro to Birding
8:00am
-
9:30am
Black Birders Week 2025 - Thurgood Marshall
9:00am
-
11:30am
Turtle Trek
9:30am
-
1:00pm
More Events >
Black Birders Week 2025 - Big Break Regional Shoreline
9:00am
-
11:00am
Rail Fair Advance Tickets
10:00am
-
4:00pm
Take a Break at the Lake - Birds & Flowers
10:00am
-
4:30pm
Memorial Day Open House
12:00pm
-
4:00pm
Full Moon Grunion Search
12:00am
-
2:00am
Black Birders Week 2025 - Coyote Hills Regional Park
9:00am
-
11:00am
The Over-the-Hills Gang: Inspiration Point
10:00am
-
12:30pm
Wednesday Walk: Shady Canyon Excursion
8:30am
-
11:30am
Fish Feeding
3:00pm
-
3:30pm
Black Birders Week 2025 - Temescal Regional Recreation Area
6:00pm
-
8:00pm
Birding at Big Break
9:00am
-
10:30am
Historic Days
10:00am
-
4:00pm
Black Birders Week 2025 - Sunol Regional Wilderness
6:30pm
-
9:00pm
Pollinator Bioblitz
9:00am
-
11:00am
Historic Days
10:00am
-
4:00pm
Story Time
10:30am
-
11:00am
More Events >
Hiking Poles: Skills & Techniques + Practice Hike
9:00am
-
3:00pm
Black Birders Week 2025- MLK Shoreline Regional Preserve
9:00am
-
11:00am
Discovery Club
9:00am
-
11:00am
More Events >