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On the far side of the Cedar Camp Pond is a wonky bridge that leans treacherously toward the pond. It can be reached by walking through a group of bushes and then going around the back of the lake to get onto the bridge. When it comes to walking on the bridge - do so at your own risk! It is not in good condition and is at such an angle that it is hard to walk on. Nowadays, the bridge just punctures one side of the pond and serves no purpose as an actual bridge.
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An abandoned cabin building can be seen in the far eastern section of Del Valle Park. It is a small, wooden cabin that is next to a creek.
The visitor center is open weekends June 1st through September 30th; 10:00am-5:00pm. The visitor center is on the lake's west side and contains exhibits and information about the history of Del Valle and surrounding wilderness. Campers and park visitors are encouraged to visit and talk with naturalists and student aides about the park and the lake, and to take part in the programs that happen during the summer. Campfire programs at the campground amphitheater begin Memorial Day weekend; campers and park visitors can join naturalists for an evening around a campfire, with activities including songs, stories, games, and marshmallow roasting. Park visitors can also enjoy a scenic boat tour of the lake with naturalist staff.
The public may rent motorboats, patio boats, pedal boats, and canoes at the East Beach marina area. Kayaks can be rented at the Kayak Center at the east beach. Any size boat may be launched at the public boat ramp.
There is a parking area near the top of the hill along Del Valle Road. If you park at this parking area and then walk alongside Del Valle Road about one-fifth of a mile to the east, you should see a gate on your right and a trail beyond it. If you follow this trail, it follows the contours for some time before intersecting with another trail and beginning a steep descent into a canyon below. If you continue deep into the canyon, you will go past several ranches and have excellent views of the mountain ranges around the Del Valle Park. The trail then passes an abandoned cabin before reaching some interesting forested country. You should eventually reach a trail called the "Cedar Camp Trail". If you take a right onto this trail, you will go about one-third of a mile along a valley until you reach the Cedar Camp. There are picnic benches and restrooms at the campsite. It is an approximately 2-3 mile hike to the Cedar Group Camp, and if you come back the way you came, it should be approximately 4-5 miles.
The one-mile Sailor Camp Trail goes up a large ridge in the far south of Del Valle. After one mile, you need a permit to continue into the Ohlone Regional Wilderness, which, although part of the East Bay Regional Parks District, is a separate park and is not in Del Valle Regional Park. Permits can be obtained at the Del Valle Park southern entrance if you do want to continue into Ohlone Regional Wilderness, which (to cross) is more than twenty miles over numerous mountain ranges and mountain peaks. The Ohlone Wilderness Trail, the only major trail in the Ohlone Wilderness, goes to Sunol Regional Wilderness and the city of Fremont.
Only the southern portion of Del Valle's western shore has any trails, but once you get away from the swimming section and the Rocky Ridge Visitor Center, the western shore trail is peaceful and gives you a better understanding of the flora and fauna of southern Del Valle Reservoir - which is different from the areas to the north of it. This section of the West Shore Trail is called the Deer Jaw Trail and goes north from the Rocky Ridge Visitor Center, along the shore of the lake, to a canyon. The trail is about one mile long.