The San Juan Islands reward the skipper who anchors out. Friday Harbor has a working pub and reliable fuel, but the real experience — the reason cruisers keep coming back — is waking up in a cove with an otter on the bow line and mist burning off a forested hill. The islands have more than 170 named landforms and dozens of working anchorages. Some are deservedly famous. Some are known mostly to locals. All of them are better than a marina.
For the canonical archipelago overview see the San Juan Islands Cruising Guide; this piece is the working anchorage shortlist.
Jones Island State Marine Park
Jones Island is the working San Juan benchmark. Protected in almost any conditions, accessible from Roche Harbor or Friday Harbor in a half-day sail, and stocked with deer that walk through camp with a casualness that suggests they have seen it all before.
The main anchorage is on the north side — good holding in sand and mud, 15–30 ft, with Washington State Parks mooring buoys that fill quickly on summer weekends. The south cove is shallower and more protected from north winds. There is a small dock for dinghy landing, hiking trails around the perimeter, and a State Parks composting toilet facility.
What to know. The mooring buoys go fast on Friday afternoons in July and August. Arrive by early afternoon or be prepared to anchor. Anchor scope matters — the holding is good but summer traffic creates wake that swings boats into each other.
Sucia Island Marine State Park
If the San Juans have a working showpiece anchorage, Sucia is it. A cluster of connected islands at the northern edge of the archipelago, Sucia has multiple coves offering different exposure — Fossil Bay on the south, Echo Bay facing north, Ewing Cove tucked away on the east.
Fossil Bay is the most popular: long, deep, well-protected from south and west. The eroded sandstone shoreline that gives the island its name creates formations that look like nothing else in the Pacific Northwest. Trails, mooring buoys, and enough coves that even a busy weekend doesn’t feel crowded. See the Orcas Island guide for the working approach detail.
What to know. Sucia is a 6–7 nm sail from Roche Harbor — leave mid-morning. Echo Bay is better for north wind, Fossil Bay for south. The buoys are managed by Washington State Parks; modest nightly fee.
Prevost Harbor, Stuart Island
Stuart Island sits at the northwest corner of the San Juans, closer to Canada than to Anacortes. Prevost Harbor is the anchorage on the island’s east side — a long, sheltered bay with good holding and no ferry traffic, which gives it a quieter character than the southern islands.
The island has two anchorages: Reid Harbor faces south and is popular with northbound boats, while Prevost is more protected and less crowded. The hiking trail to Turn Point Lighthouse is one of the better walks in the islands — 2 miles each way through old-growth forest to a lighthouse at the tip of the point, with views across Boundary Pass to the Gulf Islands.
What to know. The Canadian border is close. For boats crossing into BC, check in with CBSA — the kiosk at Bedwell Harbour is the nearest. Prevost itself is US waters. See San Juans to Gulf Islands.
Spencer Spit, Lopez Island
Spencer Spit is not a well-protected anchorage. It is exposed to the north and subject to wake from the ferry lanes. The reason it is on this list: the spit itself — a half-mile arc of sand connecting the island to a small islet — is extraordinary, and an overnight here in settled summer weather puts the boat on a swimming beach at sunset that feels like it should not exist at this latitude.
Anchor in the lee of the spit, southeast side, in 8–15 ft. Sand bottom. Land the dinghy on the spit and walk to the islet at low water. State Parks has a campground and mooring buoys. See the Lopez Island guide.
What to know. Do not anchor here with any north or northwest in the forecast. The exposure is real. This is a working fair-weather anchorage.
Reid Harbor, Stuart Island
The companion anchorage to Prevost Harbor on Stuart Island’s opposite shore. Reid faces south and runs about half a mile long. Particularly popular with boats making the passage between the San Juans and Desolation Sound — a working stop before or after the crossing of the Strait of Georgia.
Good holding in mud, state-parks buoys, and a short walk to the Turn Point trail head. Quieter than the more famous anchorages because the extra miles to get here filter out day-trippers and casual weekenders.
Garrison Bay, San Juan Island
Garrison Bay is tucked into the northwest corner of San Juan Island near Roche Harbor — a working alternative when Roche Harbor’s marina is full or loud. The English Camp unit of San Juan Island National Historical Park is here — the site of the joint British-American occupation during the Pig War boundary dispute of the 1850s and ’60s.
Anchor in 10–20 ft. The British barracks and formal garden have been restored by the National Park Service; dinghy to the dock and walk the grounds for free. The holding is adequate in mud; the bay is sheltered on three sides.
What to know. The bay shoals at its head. Don’t go much past the park dock unless the depth is verified.
Blind Bay, Shaw Island
Shaw Island is the quietest of the major San Juans — a single ferry landing, a general store run by Franciscan nuns (for years, at least), and almost no tourist infrastructure. Blind Bay on the north shore is correspondingly quiet: good holding, mostly local traffic, a few private docks but no facilities.
This is the working anchorage for cruisers who want the San Juans without the San Juans experience. In mid-July a boat can anchor in Blind Bay and feel genuinely alone, which is increasingly rare in these islands.
A working note on summer weekends
The San Juan anchorages transform in July and August. What is peaceful on a Tuesday becomes a fleet anchorage by Friday evening. The islands can handle the traffic — there is more room than appears on the chart — but bring more scope than seems necessary, be patient with neighbouring boats who anchor too close, and plan to move if the chosen spot does not work out.
The shoulder season — late May through June, and September into October — offers the same anchorages with a fraction of the boats. Water temperature is cooler, weather less predictable, but the solitude is real.
Closing notes
For the full archipelago treatment, see the San Juan Islands Cruising Guide. For passage planning detail, the San Juans 7-Day Itinerary. For the working approach to anchoring in PNW soft mud, Anchoring Techniques.
The boat that has spent five summers working through this list — Jones, Sucia, Prevost, Reid, Garrison, Blind Bay — has done the working San Juans archipelago.
Related: San Juan Islands Cruising Guide · Sucia is in the Orcas Island guide · Lopez Island Cruising Guide · San Juans 7-Day Itinerary · Anchoring Techniques · Tides & Currents