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Children watching an astronomer adjust a telescope on the Presidio Main Lawn for stargazing
San Francisco Amateur Astronomers' Star Parties
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Come join the San Francisco Amateur Astronomers for free public stargazing of the Moon, planets, globular clusters and more!

Habitat Restoration in Tennessee Valley
Habitat Restoration Team
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Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Registration Required
Habitat Restoration in Tennessee Valley
Habitat Restoration Team
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Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Registration Required
Habitat Restoration in Tennessee Valley
Habitat Restoration Team
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Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Registration Required
Volunteers at Work
Invasive Plant Patrol
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Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Registration Required
Volunteers at Work
Invasive Plant Patrol
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Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Registration Required
Volunteers at Work
Invasive Plant Patrol
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Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Registration Required
Jerusalem cricket (Stenopelmatus fuscus)
Top 10 Creepiest Critters in the Parks

Life is not all river otters and coyote pups. Some organisms in these national parks simply give us the heebie-jeebies—justifiably or not. With Halloween a few days away, here’s our list of the scariest and grossest creatures. For the squeamish, turn away. For the stout-hearted, read on—if you dare.

Volunteers at Work
Invasive Plant Patrol
-

Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Registration Required
Habitat Restoration in Tennessee Valley
Habitat Restoration Team
-

Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Registration Required

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