18 Best Sights in The San Juan Islands, Washington

This pristine patch of wilderness comprises 5,252 acres of hilly, old-growth forests dotted with five sparkling lakes, in the middle of which rises the island's highest point, 2,409-foot Mt. Constitution. A drive to the summit affords exhilarating views of the islands, the Cascades, the Olympics, and Vancouver Island, and avid hikers enjoy the strenuous but stunning 7-mile round-trip trek from rippling Mountain Lake to the summit (some 38 miles of trails traverse the entire park). The Civilian Conservation Corps built the observation tower on the summit in the 1930s. In summer, you can rent boats to paddle around both Cascade Lake and Mountain Lake. After a day of adventures, visit the Sugar Shack by Cascade Lake for homemade ice cream sandwiches. If you want to camp without hauling a lot of gear or hassling with tent setup, check out the park's five platform tents for a "glamping" experience.

To watch whales cavorting in Haro Strait, head to these 36 acres on San Juan's western side just 9 miles from Friday Harbor. A rocky coastal trail leads to lookout points and a little 1919 lighthouse. The best time to spot whales is from the end of April through September, but resident pods of orcas regularly cruise past the point. This park is also a beautiful spot to soak in a summer sunset, with expansive views of Vancouver Island and beyond.

It's hard to believe that fashionable Roche Harbor at the northern end of San Juan Island was once the most important producer of builder's lime on the West Coast. In 1882, John S. McMillin gained control of the lime company and expanded production. But even in its heyday as a limestone quarrying village, Roche Harbor was known for abundant flowers and welcoming accommodations. McMillin's former home is now a restaurant, and workers' cottages have been transformed into comfortable visitors' lodgings. With its rose gardens, cobblestone waterfront, and well-manicured lawns, Roche Harbor retains the flavor of its days as a hangout for McMillin's powerful friends—especially since the sheltered harbor is very popular with well-to-do pleasure boaters.

Fortifications and other 19th-century military installments commemorate the Pig War, in which the United States and Great Britain nearly went into battle over their respective claims on the San Juan Islands. The park comprises two separate areas on opposite sides of the island. English Camp, in a sheltered cove of Garrison Bay on the northern end, includes a blockhouse, a commissary, and barracks. American Camp, on the southern end, has a visitor center and the remains of fortifications; it stretches along driftwood-strewn beaches. Great views greet you from the top of the Mt. Finlayson Trail—if you're lucky, you might be able to see Mt. Baker and Mt. Rainier along with the Olympics. From June to August you can take guided hikes and see reenactments of 1860s-era military life.

A quiet forest trail along beautiful Shark Reef leads to an isolated headland jutting out above the bay. The sounds of raucous barks and squeals mean you're nearly there, and eventually you may see throngs of seals and seagulls on the rocky islets across from the point. Bring binoculars to spot bald eagles in the trees as you walk and to view sea otters frolicking in the waves near the shore. The trail starts at the Shark Reef Road parking lot south of the airport, and it's a 10-minute walk to the headland.

A more peaceful, less crowded hiking and wildlife-watching alternative to Moran State Park, this 1,576-acre expanse of rugged ridges, wildflower-strewn meadows, temperate rainforest, and lush wetlands is one of the natural wonders of the archipelago. Because the San Juan County Conservation Land Bank purchased this land in 2006, it will be preserved forever for the public to enjoy. There are 8 miles of well-groomed trails, including a steep trek up to 1,519-foot-elevation Raven Ridge and a windy hike to Turtlehead Point, a soaring bluff with spectacular views west of San Juan Island and Vancouver Island beyond that—it's an amazing place to watch the sunset. You can access the preserve either from the North Trailhead, which is just 3 miles southwest of Eastsound on Crow Valley Road, or the South Trailhead, which is 3 miles northeast of Deer Harbor off Wild Rose Lane.

Kids and adults love admiring the 60 or so alpacas from South America at this sprawling 50-acre ranch on the west side of the island. The shop in the big barn displays beautiful, high-quality clothing and crafts, all handmade from alpaca hair.

Artifacts from the region's Native American tribes and early settlers include some impressive ship and small-boat models and maps of local landmarks. You can also listen to fascinating digital recordings of early settlers discussing life on Lopez Island.

Surrounded by Eastsound's lively shops and cafés, this museum comprises six reassembled and relocated late-19th-century pioneer cabins. An impressive collection of more than 6,000 photographs, documents, and artifacts tells the story of the island's Native American and Anglo history, and in an oral-history exhibit longtime residents of the island talk about how the community has evolved over the decades. An exhibit about electricity and green energy includes some hands-on activities. The museum also operates the 1888 Crow Valley Schoolhouse, which is available for private tours from Memorial Day to Labor Day ($10 per person; minimum two people).

This lovely boutique winery in a pastoral setting features a modern farmhouse-chic gathering space with picnic-table outdoor seating and a garden. The only winery on Orcas, it's perfect for a sunny afternoon spent sipping wine and listening to concerts.

You'll find a wide gravel beachfront at this park 10 miles west of Friday Harbor, overlooking waters where orcas often frolic in summer, plus grassy lawns with picnic tables and a small campground.

This museum in an old farmhouse presents island life at the turn of the 20th century through historic photography, documents, and buildings.

Housed in a sleek, contemporary building, SJIMA presents rotating art shows and exhibits with an emphasis on island and Northwest artists, including the highly touted Artists' Registry Show in winter, which features works by nearly 100 San Juan Islands artists.

At this serene 20-acre park near Roche Harbor, you can stroll along five winding trails to view more than 150 colorful—and in many cases, large-scale—sculptures spread amid freshwater and saltwater wetlands, open woods, blossoming fields, and rugged terrain. The park is also a haven for birds; more than 120 species nest and breed here. It's a great spot for picnicking, and dogs are welcome.

A remodeled 1895 schoolhouse serving estate-grown wines, this picturesque winery is worth a visit for the scenery and its award-winning Siegerrebe and Madeleine Angevine varietals (the winery belongs to the Puget Sound AVA, the coolest-climate growing region in Washington). The vineyard's wines show up on many local menus.

This 2-mile public beach on the southern end of the island is part of San Juan Island National Historical Park.

Set on a spit along the Cascadia Marine Trail for kayakers, this popular spot for summer camping is on former Native American clamming, crabbing, and fishing grounds. A variety of campsites is available, from primitive tent sites to beachfront to full hookups. The lagoon is a favorite for kayaking, paddleboarding, and windsurfing.

A dramatic exterior mural depicting several types of whales welcomes you into a world that is all about these behemoth beauties. Visitors will find models of whales and large whale skeletons, recordings of whale sounds, videos of whales, and information about the plight of the three local orca pods.