Saddled with a rather generic name, Sonoma Valley Regional Park is a 162 acre preserve of gently rolling oak woodlands. In autumn the park's blue, black, and white oaks are a slight to behold, with patches of gold, blue, and red leaves conspicuous throughout the grassy hillsides. Spring is also a delightful time of year to visit, as Sonoma Valley Park is for the most part free from invasive thistles that can overtake native wildflowers' habitat.
     While Sonoma Valley Park itself is rather small, a parcel of land on the park's southeastern flank owned by the California State Lands Commission has become an informal extension of the park. As of this writing the state lands are unsigned, mostly unfenced (some fences remain near the reservoir), and commonly used by locals. If on your visit you encounter no trespassing signs and fences, do respect them. Since trail signs are few and far between at Sonoma Valley, it can be hard to stay within the park borders, even if your intentions are honorable. If you want to be completely sure that you're within the park borders, hike out and back on the paved path.
      Begin at the edge of the parking lot near the portable toilets, on an unnamed paved trail. The multi-use trail sets a level pace through grassland. Look on the right side of the trail for a plum tree and massive blackberry bramble, fed by a seep. After about 250 feet, a service road continues straight, while the trail curves right. A few steps later, at about 0.07 mile, the paved trail sweeps right again, and a fire road continues straight. Continue straight on the fire road.
     The multi-use trail runs between two oak-dotted hillsides. At 0.14 mile, bear right at an unsigned junction. A fire road veers right and uphill, while another heads downhill. Continue straight.
     Gorgeous blue oaks sprawl through grassland on both sides of the descending trail, which is quite rocky. You'll pass a small pond on the left. Vinegarweed blooms along the trail in late summer. The trail levels out and follows along a fenceline, with mature blue oaks providing shade. Ignore all the deer trails and shortcuts worn into the hillside on the right. At 0.58 mile, you'll reach a sloping meadow and unsigned junction. An informal path cuts through the grassland, but continue on the fire road until it meets another near a fenceline running perpendicular to the junction. Turn right.
     On my October hike I watched a jackrabbit scamper up the hillside to the left, where black and white oaks mix through the blues. The fire road climbs easily toward a ridge. At 0.63 mile, a fire road departs on the right. Continue straight.
     The fire road continues uphill to a crest and junction at 0.67 mile. Straight ahead Lake Suttonfield, a reservoir, stretches west, with Sonoma Mountain as a backdrop. Turn right.
     Skirting the reservoir, the fire road climbs gently through oak grassland. At 0.80 mile, you'll reach an unsigned junction with a footpath. Turn right.
     The path ascends a few feet to a hilltop, then begins a descent through blue oaks. At 0.86 mile the path ends at a T junction with a fire road. Turn left.
     An arm of the reservoir is visible on the left as the fire road ascends, then drops down to a multiple junction at 0.96 mile. Turn right onto a steep footpath.
     The narrow path climbs sharply through grassland. Just before the crest of the hill, at 1.02 miles, the footpath crosses a fire road. Continue straight.
     Look for a bench under the tree on the right -- this is a nice place for a lunch break. Almost immediately the trail begins to descend through a forest of blue oaks, with a few manzanita, black oak, and buckeye. The trail curves left around a fallen tree, then runs parallel to a small seasonal creek. Buckeyes are common in the creekbed, while the oaks prefer the slightly drier hillsides. At 1.18 miles, the trail levels out and meets the paved trail. Turn right.
      Tucked between two ascending hillsides to the left and right, the paved multi-use trail winds along a seasonal creek, with blue and black oaks and buckeyes providing partial shade. There are picnic tables along the trail in areas. As the hills spread out a bit, blue oaks and grassland dominate the landscape. Some of the trees are draped with lace lichen. At 1.51 miles, the paved trail reaches a familiar junction. This time bear left, remaining on the pavement, and return to the trailhead.

Total distance: 1.57 miles
Last hiked: Thursday, October 3, 2002


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