Alum Rock Park is located in a canyon in the Diablo Range foothills on the east side of San Jose. The park offers 13 miles (21 km) of trails, varying from fairly level along Penitencia Creek to sharp switchbacks climbing to the ridges to the South Rim Trail and the North Rim Trail. The narrow floor of the canyon includes a visitor center, picnic areas, a playground, and sand volleyball pits.
Christine I. on Alum Rock South Rim Trail
Very nice for beginners or moderate hikers.
Nice shaded trail with medium incline. The view is excellent through out. Also nice picnic area in the starting point suitable for group activities and barbecues.
By the way the first three parking lots are free and the third (closer to trail) is paid.
Great moderate hike overall hike from sycamore to south rim to historic mineral springs and a little bit up the north woodland back to our car at rustic landing which has free parking from now until sept 2016 is about 6 miles. Scenic, shady, and light incline but get you worked up within 2 miles in. Great for kids about 10+ and plenty of rest areas. Got to see the groetta mineral springs. Good place to hike in San Jose. A little bit over 2 hours for the hike. No dogs. Bikes and horse back riding trails accommodation.