 The Pearson-Arastradero Preserve has of trails for hiking, biking and horseback riding, but some trails are designated as "seasonal" and are closed because of vulnerability to erosion in heavy rain.Arastradero Lake is a twenty-minute hike from the parking lot and is open all year to fishing, although boats, flotation devices, and swimming are not permitted.The California Department of Fish and Game provides cautions when hiking in mountain lion ("Puma concolor") territories.