Getaway Guide: One Tank Trip To San Juan IslandsThe San Juan Islands sit in the rain shadow of the Olympic Mountains and receive less rain than Seattle 65 miles to the south. Explore 172 islands, which up the archipelago highlighted by Fidelgo, San Juan, Orcas, Shaw and Lopez. Expect ample outdoor activities, art galleries, museums, festivals and scenic drives on this exciting island adventure. The islands are home to the largest concentration of bald eagles in the lower 48 states, three pods of orca and harbor seals. Explore the tallest peak, Mount Constitution on Orca Island, or just bask in the sun on a weekend getaway to the sunny San Juan Islands.