The Stevens Creek Nature Trail, with self-guided interpretive stations along the way, descends into the forested canyon, continues along the creek, and heads back up through grasslands. The trail takes visitors through many of the diverse ecosystems found on the Preserve. In the grassland, one is likely to see red-tailed hawks or turkey vultures soaring overhead, or a coyote or bobcat hunting for rodents in the fields. Herds of black-tailed deer are often seen in the grassland in the fall during the mating season. Mountain lions have been spotted occasionally on this Preserve. As the trail descends into the forest, the temperature drops, the air becomes moist, and the scent of bay trees pervades the air. The forest and riparian corridor running along Stevens Creek provide a lush environment for many species, including many ferns, Douglas firs, and herbs.