Two Harbors Mooring Field

Two Harbors on Catalina Island's isthmus operates the largest mooring field anywhere on the California coast — 700 mooring balls split across Isthmus Cove on the northeast side of the narrow isthmus and Catalina Harbor on the southwest side, with no wet slips, no public boat ramp, and a vessel-length cap of 75 ft on the outer balls in each cove. The mooring field is managed by the Catalina Island Conservancy concessionaire under a long-running lease with the Catalina Island Company and books through the visitcatalinaisland.com reservation system 6 months in advance for summer weekends — Memorial Day through Labor Day routinely fills above 90% capacity and the July 4 holiday week fills within 48 hours of the booking window opening. Channel depth runs 60 ft inside Isthmus Cove, which is Catalina's signature deep, clear-water cove (visibility regularly tops 60 ft on a calm spring day) and doubles as a USCG Cutter rotation anchorage for the Coast Guard's Long Beach-based Sentinel-class fleet. Catalina Harbor on the south-facing side runs shallower at 40 ft of cove depth but offers superior protection from the Catalina Eddy westerly flow that pushes through the Santa Monica Bay channel on summer afternoons; experienced cruisers regularly relocate mid-day from Isthmus Cove to Cat Harbor to ride out the afternoon blow. The surrounding waters fall partly under the Channel Islands National Marine Sanctuary jurisdiction (Santa Catalina sits outside the sanctuary boundary but the federal waters between Catalina and Anacapa are inside), and the California Department of Fish and Wildlife enforces a network of Marine Protected Areas around Catalina that prohibit take in roughly 16% of the island's coastline — operators consult the CDFW MPA map before fishing or spearfishing. Fuel and vessel-pumpout services run from a tender boat that services moored vessels on radio request (VHF Ch. 9 hailing, switch to Ch. 68 working) — there is no fixed fuel dock at Two Harbors and the closest fixed fuel is 23 nautical miles east at Avalon. Weather window honesty: the open-ocean Catalina Channel crossing from Long Beach Harbor to Two Harbors is a 30-nautical-mile transit that turns dangerous when westerly winds exceed 20 knots and the harbormaster broadcasts a daily morning weather advisory on Ch. 16 with a Go / No-Go call for the crossing. RV access is impossible — Catalina Island has no auto ferry from the mainland, no RV-friendly campground anywhere on the island, and ground transport on the island is restricted to authorized service vehicles only under the Catalina Island Conservancy management plan. The only campground in Two Harbors is the tent-only Two Harbors Tent Campground (Conservancy-managed, walk-in or small-van only, no RV slots). Plan: stage the rig at a mainland RV park (Bolsa Chica State Beach Campground in Huntington Beach is a common staging choice — 50 sites, no electric, 35-ft rig cap, reservecalifornia.com 6 months out) and ferry across to Two Harbors as a foot passenger via the Catalina Express terminal in San Pedro.