The park opens at 8:00 a.m. and closes at sunset.
$7 per vehicle for day use. $1 per person (vehicles with 10 or more people). Regional Parks Members park free through June 2014.
Dogs are not allowed on trails. Dogs are permitted on Channel Drive (a paved road) within the park. They must be on a leash no longer than 6' in length. License required.
Picnic tables, portable restroom, packed dirt lot and table.
Temperatures during the summer are in the 80s and 90s. Wintertime highs are in the 50s. Rainfall averages about 30 inches a year, most of it during the winter and early spring. Snow is quite rare, and there is little fog.
The park, 60 miles north of San Francisco on the eastern edge of Santa Rosa offers miles of trails for hiking, mountain biking, and trail riding.
For wildflower lovers, Annadel Park offers a great variety of flowers from early Spring until early Summer, especially on a hike around Lake Ilsanjo. The best months to see the park's wildflowers are April and May, but there are some plants in bloom as early as January and as late as September.
Fishing Lake Ilsanjo offers excellent fishing for black bass and bluegill. Black bass weighing nine pounds and more have been caught here. A purple plastic worm is a favored bait for the bass, while the bluegill favor garden worms, small crayfish, and grubs. If you are 16 years of age or older, you must have a California fishing license. Ledson Marsh dries up by late August or early September and so no fish are found there.
There is no camping in the park. Fires, camp stoves, and barbecues are not allowed.
Campsites are available at the county campground at Spring Lake Regional Park and at Sugarloaf Ridge State Park, about ten miles east of Annadel State Park via Highway 12 and Adobe Canyon Road.
Horses and bicycles are allowed only on designated trails. Off-trail riding is not permitted.
Drinking water should be carried on the trails. The water in Hunter Springs is suitable for horses only.
Motor vehicles are allowed only on the entrance road and in the parking lot within the park.
Accessible features include two accessible picnic tables sit on a firm surface under a tree off the main parking lot at the end of Channel Drive. There is an accessible portable restroom nearby and the parking lot includes one site designated accessible. The packed dirt lot and path to restroom and table are generally accessible.
Lock your car and take your valuables with you. Don't Litter! If you bring it in, take it back out.
Warren Richardson Trail (fire road)
This trail, commemorating a prominent cattle rancher and hop grower, begins at the parking lot at the end of Channel Drive and goes uphill through a forest of Douglas fir, bay and redwood trees. Parts of the trail are home to the pileated woodpeckers and pygmy owls, and in the spring keep an eye out for the calypso or the Redwood orchid between the Two Quarry and Steve’s “S” Trail junction. At the 900-foot elevation, the forest gives way to open meadows and mixed oak woodlands, and you will get your first glimpse of Lake Ilsanjo when you intersect the North Burma Trail. The trip will take you an hour or less to cover the 2 ½ miles to Lake Ilsanjo. There is a restroom at the eastern shore of the lake and picnic tables are scattered along the shoreline. Circle the lake and return via Steve’s “S” Trail for a 6-mile loop hike.
This narrow, 2 mile trail beginning at the auxiliary parking area on Channel Drive, is rocky on the bottom third then flattens as it nears the boundary of the park. Farther along this trail you will reach the Wymore Quarry. At one time there was a gravity-powered, narrow gauge tramway that took the cobblestones produced at the quarry to a small gauge railroad line, which is now Channel Drive. The stones were then transported to San Francisco and Sacramento, where you can still see the old cobblestone streets. The trail ends at Rough-Go Trail; turning left will take you to the lake.
Spring Creek Trail
There are two access points to this trail, one is the service road from Spring Lake’s horse trailer parking area and the other is from Santa Rosa’s Viet Nam Veteran’s Trail. At the beginning, the trail increases in elevation. This trail is completely shaded by alders, redwoods and arching bay trees that grow along the creek canyon, making this one of the most pleasant trails in the park on a hot summer day. The trail ends at beautiful Lake Ilsanjo.
Canyon Trail (fire road)
This 2-mile trail begins at the intersection of Spring Creek Trail, by a wooden bridge. The trail’s elevation increases steadily. At the top is a great view of Santa Rosa, the coastal mountain range, Mt. Saint Helena and the geysers in Napa County. The colorful “Indian Warriors,” bloom from March through May and grow at the Marsh Trail intersection. Canyon Trail ends at Lake Ilsanjo, after passing by Hunter Spring where a horse-watering trough is located.
This trail climbs steadily from its beginning at the intersection with Canyon Trail. Marsh Trail skirts the northern flank of Bennett Mountain. Higher elevations provide views of Lake Ilsanjo and the Mayacamas Mountain Range. The trail runs through prime oak woodlands, grasslands and cool islands of coastal redwoods. The threatened California red-legged frog, popularized by Mark Twain’s "Celebrated Jumping Frog of Calaveras County," lives at Ledson Marsh where the trail terminates. (Please step with care.) The structures attached to various trees surrounding the marsh are nesting boxes for wood ducks. A restroom is located at the Two Quarry Trail intersection.
North Burma Trail
This trail begins 1/3- mile beyond the ranger station on Channel Drive. It follows a seasonal creek, which receives its water from False Lake Meadow, a highland vernal pool, and passes through areas of chaparral and mixed forests. In the vernal pool near the Live Oak Trail area, look for the tiny, very rare white fritillary from March through May. The trail borders several meadows and will end at the Warren Richardson Trail, where there is a wonderful view of Lake Ilsanjo.
Once you start on this trail, you will know how it got its name. It is a steep, rough path with full southwestern sun exposure and will take you past rocks, boulders and grassland meadows on your way to Lake Ilsanjo.
This trail begins at the eastern end of the park, located off of Lawndale Road from Highway 12, near Kenwood.
Steve’s “S” Trail
This trail, which is for hikers only, begins and ends at the Warren Richardson Trail. It is a steep hiking trail and is quite shaded by firs and bay trees. The trail gets its name from Steve Hutchinson, the grandson of the Hutchinson family, who had his own secret trails throughout the ranch, thus the “S” is for secret. You will walk over a large area of obsidian chips, which was a very important resource for the Native Americans of the area. (Please remember do not collect any minerals or flowers.)
This trail starts just past the ranger station on Channel Drive and ends at the main parking lot. The old dumpsite between the trail and the road was used to dispose of farm items such as hop kilns and metal frames when the land was known as the Annadel Farm. About three-fourths of the way on the trail, you will need to exit the trail and go along the asphalt Channel Drive for a very short distance before returning to the dirt trail. This area was one of many quarries sites that are located in Annadel.