🌤 Weather at Clear Lake State Park by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 20–64 °F | 51–79 °F | 28–70 °F | 12–31 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Atlanta 5 Wnw, 7 mi away, elevation 1,180 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
🛶 California’s Largest Natural Freshwater Lake — Swimming, Kayaking, and Wine Country Camping — A lakefront park with four campgrounds, Pomo cultural trails, and bass fishing on the shores of Clear Lake beneath the dormant volcano Mount Konocti — Lake County, California
Clear Lake State Park sits on the shores of Clear Lake — the largest natural freshwater lake entirely within California. While Lake Tahoe straddles the Nevada border and is better known, Clear Lake is geologically older (estimated 2.5 million years, making it one of the oldest lakes in North America) and offers a warmer, more accessible lake experience surrounded by the emerging Lake County wine region and dominated by the dramatic silhouette of Mount Konocti, a dormant volcano rising 4,300 feet from the lakeshore.
The park offers four campgrounds, a swim beach, boat launch, and trails highlighting both natural history and Pomo Native American cultural heritage. Clear Lake is famous among anglers as the “Bass Capital of the West” — regularly hosting major bass fishing tournaments.
Trails
| Trail | Distance | Difficulty | Highlights |
|---|---|---|---|
| Indian Nature Trail | 0.5 mi | Moderate | Pomo cultural history, self-guided interpretive |
| Dorn Trail | 2.5 mi | Moderate | Hillside views, oak woodland, wildlife |
| Kelsey Creek Trail | 0.25 mi | Easy (ADA) | Creekside, waterfowl viewing, accessible |
On the Water
| Activity | Details | Notes |
|---|---|---|
| Swimming | Designated beach | No lifeguards, no dogs on beach, sunrise–sunset |
| Kayaking/Canoeing | Sheltered coves, Kelsey Creek | Bring own or rent in Kelseyville |
| Bass Fishing | “Bass Capital of the West” | Largemouth bass, crappie, catfish — CA license |
| Boating | Public launch ramp | Motorized and non-motorized |
Campgrounds
| Campground | Cost | Details |
|---|---|---|
| Cole Creek | $35/night | Near swim beach, fire ring, table, food locker |
| Kelsey Creek | $35/night | Year-round, creek access |
| Lower Bayview | $35/night | Lake views, seasonal |
| Upper Bayview | $35/night | More private sites, shade |
| Day Use | $8/vehicle | CA State Parks fee |
Best Time to Visit
| Season | Weather | Best For |
|---|---|---|
| Spring (Mar–May) | 55–78°F | Wildflowers, bass spawn, wine tasting, comfortable |
| Summer (Jun–Aug) | 85–100°F+ | Swimming, full lake recreation — HOT, bring shade |
| Fall (Sep–Nov) | 60–82°F | Wine harvest, cooling temps, fewer crowds |
| Winter (Dec–Feb) | 40–55°F | Kelsey Creek campground open, eagle watching, quiet |
⚠️ Know Before You Go
| Item | Details |
|---|---|
| 🌡️ Summer Heat | Temps regularly exceed 100°F — bring shade, water, sunscreen |
| 🦟 Insects | Gnats (“Clear Lake gnats”) can be thick in spring |
| 🔵 Water Quality | Check local advisories — algae blooms can affect swimming |
| 📲 Reservations | HIGHLY recommended May–September via ReserveCalifornia |
Frequently Asked Questions
Is Clear Lake really the biggest lake in California?
Largest natural freshwater lake entirely within California — yes. Lake Tahoe is larger but straddles the Nevada border. Clear Lake is also one of the oldest lakes in North America (~2.5 million years).
What’s Mount Konocti?
A dormant volcano (4,300 ft) directly across the lake from the park. Hiking trails to the summit are managed by Lake County — check current access status before visiting.
Is the bass fishing really that good?
Yes. Clear Lake is known as the “Bass Capital of the West” and hosts major professional tournaments. Largemouth bass regularly exceed 10 pounds here.
Are the gnats bad?
In spring, yes. Clear Lake gnats can be thick March through June. They don’t bite but are annoying. Summer and fall are better.
Is there wine tasting nearby?
Yes. Lake County is an AVA known for volcanic-soil wines — Sauvignon Blanc, Cabernet Sauvignon, and Zinfandel. Family-run wineries near Kelseyville and Lakeport.
Can I bring my dog?
Dogs allowed in campgrounds on leash. No dogs on the swim beach.
How far from San Francisco?
About 120 miles (2.5 hours) north via US-101 and CA-29 through wine country.
Do I need reservations?
Yes — especially May through September. Reserve via ReserveCalifornia.com. Kelsey Creek campground is open year-round.
Keep exploring: The closest neighbors are Ocqueoc Falls Bicentennial Pathway (within about an hour’s drive) and Onaway State Park (within about an hour’s drive).
🛶 California’s Oldest Lake
2.5 million years old, California’s largest natural freshwater lake, world-class bass fishing, and wine country camping — all beneath a dormant volcano. Reserve early.
🐾 Dogs & Pets at Clear Lake State Park
- Pets allowed? statewide rule
- Pets are welcome in Michigan state parks, campgrounds, harbors and state-designated trails, except designated swim beaches and other posted areas.
- Leash rule statewide rule
- Pets must always be on a 6-foot leash and under the owner's immediate control.
- Beaches & swim areas statewide rule
- Pets are prohibited in buoyed swim areas but allowed along the shoreline outside them (on a 6-ft leash, even in the water); 50+ parks have pet-friendly shoreline or designated dog beaches.
- Cabins & lodging statewide rule
- Up to two pets (cats and dogs only) allowed at ~12 parks' designated pet-friendly cabins, yurts and lodges; $10 per night per pet (cabins) or $15 (lodges); otherwise pets barred from overnight lodging.
- Pet fees statewide rule
- No day-use pet fee; pet-friendly lodging costs $10/night per pet (cabins) or $15/night per pet (lodges).
- Statewide exceptions statewide rule
- Leash laws do not apply to dogs used for hunting on land open to such use; pets may not be left unattended.
Are dogs allowed at Clear Lake State Park?
Pets are welcome in Michigan state parks, campgrounds, harbors and state-designated trails, except designated swim beaches and other posted areas. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via michigan.gov. More: Michigan state parks guide · Dog rules in all 50 states compared
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