Flowing along the south shore of Big Lagoon near Trinidad in Northern California, the Harry A. Merlo State Recreation Area offers a combination of riverine forest and coastal lagoon access. It provides a serene backdrop perfect for fishing fans. It’s ideal for wildlife watchers and families looking for a peaceful outdoor retreat.
What Makes Harry A. Merlo State Recreation Area Unique
Nestled between Trinidad and Humboldt Lagoons State Park, Harry A. Merlo SRA offers a rare mix: lagoon-edge wetlands, quiet swimming spots, bike- and dog-friendly paths, and stargazing-friendly skies. Anglers targeting salmon, steelhead and bass here often share their tales long after they land on shore. It’s also officially rated a dark‑sky location—ideal for spotting meteors or scanning the Milky Way over Big Lagoon.
Top Activities & Amenities
Picnicking & Day Use
Spacious day‑use areas include picnic benches and BBQ grills under tall trees by the lagoon. Portable and flush restrooms, parking, and drinking water are nearby—ideal for relaxed family gatherings or scenic lunch spots.
Fishing, Boating & Beach Access
Harry A. Merlo offers a boat launch into Big Lagoon for small crafts—canoes, kayaks and drift boats (5 mph speed limit). Anglers fish for salmon, steelhead, bass and perch from shore and boat. Swimming is seasonal in calm lagoon areas.
Hiking & Wildlife Viewing
Trails through forest and meadow lead along Big Lagoon shores. Birders and wildlife fans encounter egrets, herons, Roosevelt elk, otters and occasionally deer. Dogs on leash are welcome in day‑use areas—but trails are off‑limits to pets.
Camping & Group Sites
The park offers dispersed group camping. It provides fire rings, grills, drinking water, and picnic space. No traditional campsites are available. No RV hookups or dump station—but primitive overnight stays are popular among small groups.
Recreation Courts & Play Areas
A grassy playground, volleyball court, horseshoe pits and open areas support active family use. These facilities create a park-like feel while keeping the natural lagoon setting intact.
Interpretive Programming
Visitor info panels describe tidal lagoon ecology, fish runs, and local Yurok heritage. Occasional ranger‑led talks and seasonal events add context and enrich visits.
Practical Visitor Tips
- Hours & Fees: Open sunrise to sunset year-round; no day‑use fee. Boat launch may require a Discover Pass.
- Parking: Large lot near lagoon; dog‑friendly only in parking/day-use zones, not on trails. Park closes at sunset.
- Camping: Primitive group camping only—no reservations, no hookups. Bring your own water and pack‑out trash.
- Boating & Fishing: Boats limited to 5 mph. All anglers 16+ need a valid California fishing license.
- Restrooms & Drinking Water: Flush and portable toilets available. Bring your own supplies.
- Wildlife Safety: Use bear‑safe food storage, give elk and otters space, and stay on marked paths.
- Pets: Leashed dogs welcome in picnic/parking areas only. Do not bring pets on trails.
- Stargazing: With Bortle 2 skies, this is a dark‑sky gem. Bring red‑light headlamps for night use.
Local Insight & Hidden Gem
Arrive at sunset with a tackle box or telescope in hand—Big Lagoon often turns golden, and stargazing begins soon after. Try a twilight boat paddle to watch otters and osprey before dark. Weekend mornings feature anglers lining the shore in silent camaraderie with the lagoon. Pack a sandwich and hike a short spur trail toward the southern marsh—it’s a surprising birdwatching hotspot for teal, herons, and kingfishers. Then drive into Trinidad for fresh-baked sourdough and artisanal chocolate—an ideal treat after an off-the-grid escape at Merlo.