Spacious RV camping on Marrowstone Island with standard, partial, and full-hookup sites, beaches, historic batteries, and rigs up to 50 feet.
Fort Flagler Historical State Park occupies the north end of Marrowstone Island, with broad views across Admiralty Inlet and Port Townsend Bay. Its two developed campgrounds offer different experiences: the Lower Campground has standard, partial-hookup, and full-hookup sites near the water, while the Upper Campground has more private standard sites in the forest. Official park materials list 59 standard and 55 full-hookup sites and accommodate RVs up to 50 feet. Campers can walk historic coastal-defense batteries, hike shoreline trails, paddle from the beach, and use flush restrooms, showers, drinking water, and a dump station.
Fort Flagler sits where Port Townsend Bay meets Admiralty Inlet, with shoreline on three sides and long views toward Whidbey Island and the Olympic Mountains. The park's trails link beaches, bluff overlooks, forest, and the remains of the Harbor Defenses of Puget Sound. Fort Worden and Fort Casey form the other two points of the historic Triangle of Fire and make natural follow-on stops.
Practical guidance assembled from current operator maps, park pages, and clearly identified community observations.
Choose the Lower Campground for water views and standard, partial-hookup, or full-hookup choices; choose the Upper Campground for a quieter forest setting with standard sites. The lower campground is reservable year-round beginning in 2026, while upper-loop availability changes seasonally. Confirm the length limit for the exact site even though the park accommodates RVs up to 50 feet.
| 📍 Nearest Town | Port Townsend, WA |
| ⛽ Gas Station | — |
| 🛒 Grocery Store | — |
| 🏪 Costco | — |
| ☕ Starbucks | — |
| 🏕️ Nearest State Park | — |
Stock up in Port Townsend, WA before heading out — services get limited near the campground.
Ready to book?
Reservable up to 9 months in advance. Confirm current rules, site dimensions, and conditions with the operator. Booking and availability are handled externally.