5,000 acres, 6201 Channel Drive, off Montgomery Drive, Santa Rosa, (707) 539‑3911. Hiking, mountain biking, equestrian trails, picnicking, fishing. Lake Ilsanjo, shady forests and sunny, flowery meadows. Parking $6.
752 acres, 17000 Armstrong Woods Road, two miles north of Guerneville. District office: (707) 865‑2391; park: (707) 869‑2015. Hiking and nature trails among tallest trees in Sonoma County (many of them more than 2,000 years old), bicycling on paved roads, horseback riding, picnic areas. Parking $8.
128 acres, east of Petaluma Hill Road on Pressley Road, (707) 527‑2041. Oak woodlands, spring wildflower displays, trails for hikers, bicyclists and equestrians. Parking $7.
150 acres, on Doran Park Road, south of Bodega Bay, on spit separating bay from Pacific Ocean, (707) 875‑3540. Spectacular, scenic cliffs; access to sandy coves; vantage points for observing migrating gray whales. Picnic areas, campgrounds, bird walk, nature study area, boat launch, beach, horseback riding on the beach, coastal access for fishing, clamming and surfing. Parking $7.
230 acres, 3800 Hembree Lane, Windsor, (707) 565‑2041. Recreational trails through oaks. Parking $7.
210 acres, off Chileno Valley Road in Petaluma, (707) 565‑2041. Spectacular views, hiking and biking trails, picnic area, small playground. Parking $7.
1,450 acres, east on Sonoma Highway (12) and north of Kenwood, (707) 565‑2041. Panoramic views of Valley of the Moon from 2,700-foot summit. Equestrian, hiking trails. Open weekends, county holidays only. Park closed during summer fire season. Parking $7.
837 acres, 1.5 miles west of Glen Ellen on London Ranch Road, (707) 938‑5216. Hiking, nature trail, equestrian trail, self-guided history trail, author's grave, Wolf House ruins, museum, historic buildings. Hiking among historic ranch buildings on Sonoma Mountain with views of redwood forests, vineyards, Sonoma Valley. Call for hours. Parking $8 general.
Abandoned railroad right-of-way crossing scenic Laguna de Santa Rosa for 2.9 miles, (707) 565‑2041. Trailhead at Petaluma Avenue, Sebastopol. Two-mile trail runs from Analy High School in Sebastopol to Highway 116. No parking fee.
317 acres, next to Salt Point State Park, 20 miles north of Jenner on Highway 1, (707) 847‑3221. Hiking trails among second-growth redwood forest with Douglas firs, grand firs, tan oaks, and rhododendron, which bloom with pink blossoms in May. Free parking.
18,000 acres of federal parkland and water, 3333 Skaggs Springs Road, off Dry Creek Road, 11 miles northwest of Healdsburg, (707) 433‑9483.
85 acres, at Verano Avenue and Sonoma Highway (12), Sonoma, (707) 565‑2041. Nature trail, bicycle path, basketball court, tennis courts, volleyball, baseball field, football and soccer fields, picnic area with barbecues, playground. Parking $7.
156 acres, 500 Ragle Road, north of Bodega Avenue, west of Sebastopol, (707) 565‑2041. Hiking and equestrian trails, bicycle path, soccer fields, volleyball, par course, picnic area with barbecues, playground, gazebo, tennis courts. Parking $7.
5,970 acres, 20 miles north of Jenner on Highway 1, (707) 847‑3221. Hiking, bicycling, camping, picnicking, fishing, horseback riding, designated underwater area. Coastline hiking, with grasslands and pine forests. Pygmy Forest, where nutrient-poor soil has produced mature, stunted Bishop pines, redwoods, cypress and manzanita. Parking fee $8.
Five public trails to beach along Highway 1, between Gualala and Sea Ranch in far northwest corner of county. Bluffs overlooking Pacific Ocean, abundant wildflowers in season. Hiking, restrooms. Look for access signs along highway. Parking $7.
948 acres, at Faught and Shiloh roads, Windsor, (707) 565‑2041. Three miles of trails for hiking, riding. Parking $7.
40 acres, on Kelley Road, near Annapolis, (707) 565‑2041. Hiking trails, picnicking in redwood preserve. No parking fee.
13 miles of coastline along Highway 1 from Russian Gulch to Bodega Head, including Bodega Dunes and Wright's Beach campgrounds, (707) 865‑2391 or (707) 875‑3483. Special sites for hikers, bicyclists, camping, picnicking, fishing, horseback riding, exhibits, designated underwater areas. Access along Highway 1.
162 acres, off Highway 12, north of Boyes Hot Springs, (707) 565‑2041. Hiking, bicycle and equestrian trails, picnic areas. Nearby is Bouverie Wildflower Preserve, available for viewing only from road. Parking $7.
320 acres, next to Santa Rosa's Howarth Park and Annadel State Park, (707) 565‑2041. Hiking, equestrian trails, bike paths plus visitor center with nature walks and displays, par course, summer swimming, boating, camping and picnicking. Parking $7.
206 acres, along Highway 1, 16 miles north of Jenner, (707) 847‑3245. Spectacular coastal views. Picnic areas, campgrounds, fire rings, hot showers, beach, fishing, historic one-room schoolhouse. Parking $7.
2,700 acres, 2605 Adobe Canyon Road, seven miles east of Santa Rosa, 833-5712. Rugged terrain and views from mountain peaks. Hiking, horseback riding, camping, picnicking. Parking $8.