Lake guide
Lopez Lake
Arroyo Grande, San Luis Obispo County, CA
Overview
Lopez Lake is a county-run reservoir in the hills above Arroyo Grande, in San Luis Obispo County. SLO County Parks operates the Lopez Lake Recreation Area at 6800 Lopez Drive, and the lake covers nearly 1,000 acres. It is the main trailer-boat lake on the south county coast, and unlike its neighbor Santa Margarita Lake it is a recreation lake where boaters of every type are welcome.
Launching and the marina
The Lopez Lake Marina has a launch ramp, a food store, snack bar, tackle shop and year-round boat rentals. The state boating facilities directory lists the launch facility with 100 parking spaces for cars with trailers, 15 carry-down walkways and 65 dry storage spaces. Canoes and kayaks can also use the Mallard Cove hand-launch area.
Mussel inspection comes first
Every boat must be inspected before it can launch, and the rules tightened on January 1, 2026. Vessels must arrive clean, drained and dry. Boats with internal ballast tanks or ballast bags need a 30-day quarantine, bleach decontamination is no longer accepted, and any boat used on an infested water in the previous 30 days is refused. Clear tags from other lakes have not been honored here since November 1, 2024.
On the water
The lake is known for crappie, bass, catfish and sunfish, and the upper Lopez Arm is a quiet area for canoeing. Windy coves attract windsurfers. Lake levels change through the year, so check current conditions with the park before you tow.
Getting there & access
By road
The recreation area entrance is at 6800 Lopez Drive in Arroyo Grande. The state facility listing places the launch at about 35.1925, -120.4638.
Marina launch ramp
The Lopez Lake Marina has the public launch ramp, along with a store and rentals. The state directory lists 100 parking spaces for vehicles with trailers and 15 carry-down walkways for small craft.
Hand launch
Canoes and kayaks can launch from the Mallard Cove hand-launch area. All boats, including paddle craft, must still clear inspection and pay the non-motorized fee.
Inspection before launch
Rangers inspect each vessel before it enters the water. Arrive with the boat clean, drained and dry, with ballast tanks and live wells emptied and dried. For questions, call the ranger line at (805) 788-2386 or the mussel hotline at (805) 788-6006.
Amenities
- Marina store — Food store, snack bar and tackle shop at the marina
- Boat rentals — Available year-round at the marina
- Launch ramp — Marina ramp with 100 car-with-trailer parking spaces
- Carry-down walkways — 15 for hand-carried boats (state facility listing)
- Dry storage — 65 spaces listed for the launch facility
- Camping — Campsites in the recreation area, plus day-use and picnic areas
- Restrooms and showers — Listed for the launch facility
- Windsurfing coves — County fee schedule includes a per-board fee for wind, sail and foil boards at Lopez Lake
Rules & official resources
- Every vessel must pass a mussel inspection and arrive clean, drained and dry before launching
- As of January 1, 2026, boats with internal ballast or ballast bags require a 30-day quarantine, and bleach decontamination is no longer accepted
- Boats used on an infested lake within the previous 30 days are prohibited from launching
- Clear tags from other lakes are no longer accepted (since November 1, 2024), and Lopez and Santa Margarita no longer honor each other's tags
- Day-use fees: $12 per vehicle, $15 per motorized boat (including battery and electric), $5 per non-motorized boat, $3 per wind, sail or foil board
- California Boater Card required for all operators of motorized vessels, regardless of age, since January 1, 2025
Common boat service needs here
Engine and trailer checks
Towing up a hill road to a lake with strict inspection means trailer brakes, bearings and outboards deserve a pre-season check. Dry, drained boats clear inspection faster.
Find Marine Mechanics & Engine Service providers →Washdown and detailing
Freshwater boats collect lake scum and mineral spotting. A thorough wash and wax between trips helps keep surfaces clean and inspection-ready.
Find Boat Detailing & Washing providers →Dry-storage and trailer transport
The launch facility lists 65 dry storage spaces, and owners without a tow rig often hire transport to and from the ramp.
Find Boat Transport, Towing & Delivery providers →Canvas and upholstery
Inland Central Coast summer sun is hard on Bimini tops, covers and cushions on boats kept at the lake.
Find Canvas, Covers & Upholstery providers →Guides & FAQs
Nearby providers
No providers listed near this location yet — check back soon.
Sources
Last verified October 6, 2026