The park is subject to either closure or fire restriction during the wildfire season from June through October.

It originally was inhabited by Native Americans, and was subsequently primarily ranch land, with chaparral, oak woodland, and grassland habitats.

Along Alameda Creek, riparian trees include White alder (Alnus rhombifolia), willow species, and California sycamore (Platanus racemosa).

In spring, wildflowers are abundant, including Chinese Houses, Ranunculus, monkeyflowers, California Poppy, goldfields, and several species of Lupines.

Common amphibians and reptiles include the California red-legged frog, Pacific tree frog, California newt, Diablo Range garter snake, Western rattlesnake and San Francisco alligator lizard.