Skagit Island Marine State Park

Skagit Island Marine State Park: Pristine Old-Growth Island Sanctuary in Skagit Bay

Skagit Island Marine State Park preserves a remarkable 25-acre wilderness island in Skagit Bay, offering solitude and seclusion in one of Washington’s most pristine marine environments near Deception Pass. This boat-access-only destination features nearly half its area covered in dense old-growth forest, with wildflower-filled grassy meadows, rock outcroppings, and sandy beaches creating diverse ecosystems on a compact island setting. As part of the Cascadia Marine Trail system established in 1993 to honor thousands of years of Indigenous water transportation, the park provides primitive camping exclusively for human-powered watercraft while maintaining the untouched character that has made it an outpost of serenity since its designation as a military reservation in 1866.

Skagit Island Marine State Park Fast Facts

Park Overview

Skagit Island Marine State Park occupies a unique geological position where bedrock formations represent ancient oceanic spreading zones, creating part of an ophiolite sequence that tells the story of tectonic plate boundaries millions of years ago. The island’s remarkable preservation includes dense old-growth forest covering nearly half its area, while a few acres on the southwestern tip support wildflower-filled grassy balds that create stunning seasonal displays. This combination of ancient forest and open meadows, combined with rock outcroppings and sandy beaches, provides diverse habitats within a compact island setting.

The island’s rich cultural history spans from thousands of years of Indigenous use, where hunters stretched nets between Skagit Island and neighboring Flagstaff Island to catch ducks, to its designation as a military reservation in 1866 and eventual transfer to Washington State Parks in 1922. Unlike the developed Deception Pass State Park that emerged from the same military reservation, Skagit Island has remained largely untouched, preserving its character as a true wilderness retreat accessible only to those willing to make the boat journey.

Activities & Recreation

The island’s land trail provides access to both old-growth forest environments and open meadow areas, while the varied shoreline offers opportunities to explore different coastal ecosystems from sandy beaches to rocky outcroppings. The island’s small size makes it perfect for circumnavigation by kayak, while the two mooring buoys on the northwest side accommodate larger boats for those who prefer to camp aboard their vessels.

Facilities & Amenities

Skagit Island Marine State Park maintains minimal facilities consistent with its wilderness island character and boat-access-only designation. The island provides one primitive campsite available for general use and one campsite designated exclusively for Cascadia Marine Trail participants using human-powered watercraft. A vault toilet serves island visitors, representing the only developed facility on the island. Two mooring buoys on the northwest side of the island accommodate boats for those preferring to camp aboard their vessels rather than on land. No docks, potable water, or other amenities are available, requiring complete self-sufficiency from all visitors.

Camping & Accommodations

The island offers extremely limited overnight accommodations with just two primitive campsites designed for visitors arriving by boat. One campsite serves general boat-access camping, while the second is reserved exclusively for Cascadia Marine Trail participants using human or wind-powered watercraft. All camping is primitive with no water, electricity, or services available beyond the single vault toilet. Campers must bring all necessary supplies including water, food, and waste disposal materials while adhering to strict leave-no-trace principles to preserve the island’s pristine character. The mooring buoys provide an alternative for visitors who prefer to camp aboard their boats.

Planning Your Visit

Skagit Island Marine State Park operates year-round with seasonal hours from 6:30 AM to dusk during summer and 8 AM to dusk during winter months. The park requires a Discover Pass for day visits and advance planning due to its boat-access-only nature and extremely limited camping capacity. The island is located 1 mile east of Hoypus Point and 1.5 miles east of Cornet Bay in Deception Pass State Park, making it accessible for experienced kayakers and boaters. Weather conditions significantly affect access difficulty, with calm conditions essential for safe travel to and from the island.

What to Bring & Know

• Complete self-sufficiency essential as no water, food, or supplies available on island
• All camping equipment, water, and provisions must be transported by boat
• Primitive camping requires pack-in, pack-out practices for all waste materials
• Cascadia Marine Trail designation means one campsite reserved for human-powered watercraft only
• Old-growth forest and grassy meadows provide diverse hiking experiences on compact island
• Two mooring buoys available first-come, first-served on northwest side of island

Final Word

Skagit Island Marine State Park delivers an authentic wilderness island experience where pristine old-growth forests and wildflower meadows create a perfect sanctuary for adventurous visitors seeking solitude and natural beauty in Skagit Bay’s protected waters.

This park is part of the Explore Washington State Parks Directory—showcasing all of Washington’s State Parks from the rugged Pacific coast to the Cascade peaks. Whether you’re camping under old-growth forests, hiking scenic trails, or discovering local history, we’re highlighting the places where people connect with the state’s incredible natural and cultural heritage—all year long.

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Explore Washington State has been covering the real Washington for more than a decade. State parks, small towns, back roads, rest stops, and the people who make this place worth exploring. What started as a hyperlocal project covering individual communities grew into a full media project with more than 340 podcast episodes, a weekly newsletter with 3,800 subscribers, and coverage of all 146 Washington State Parks. The content here comes from people who have actually been to these places: locals, regulars, and lifelong Washington residents who care more about getting it right than getting clicks.

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