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Routes
Hiking trails & Routes
United States
Washington
Jefferson County
Marrowstone

Anti-Aircraft Battery Trail, Bluff Trail, and Lagoon Loop

Routes
Hiking trails & Routes
United States
Washington
Jefferson County
Marrowstone

Anti-Aircraft Battery Trail, Bluff Trail, and Lagoon Loop

Moderate

2.7

(17)

56

hikers

Anti-Aircraft Battery Trail, Bluff Trail, and Lagoon Loop

02:06

7.81km

100m

Hiking

The Anti-Aircraft Battery Trail, Bluff Trail, and Lagoon Loop is a 4.9 miles (7.8 km) hiking route in Fort Flagler State Park, rated moderate. You will gain 328 feet (100 metres) over an estimated 2 hours and 6 minutes, offering a rewarding outdoor experience.

What to expect on Anti-Aircraft Battery Trail, Bluff Trail, and Lagoon Loop

On this trail, you can expect a diverse landscape, combining historical elements with natural beauty. The Anti-Aircraft Battery sections will lead you past remnants of former coastal defenses, offering a glimpse into the area's military past. As you traverse the Bluff Trail, prepare for dramatic ocean vistas and sweeping views of the surrounding coastline. The Lagoon Loop provides a serene contrast, winding around a beautiful lagoon that attracts various waterfowl, and you'll also pass by the Wooden Pier at Fort Flagler State Park.

Planning your visit

Parking is generally available at Fort Flagler State Park, providing convenient access to the trailhead. Always check the park's official website for any specific fees or current conditions before your visit. This Anti-Aircraft Battery Trail, Bluff Trail, and Lagoon Loop hiking location is well-suited for a day trip.

Trail details

  • Distance: 4.9 miles (7.8 km)
  • Elevation gain: 328 feet (100 metres)
  • Difficulty: moderate
  • Estimated time: 2 hours and 6 minutes

Last updated: March 7, 2026

Waypoints

A

Start point

Parking

Get Directions

1

3.26 km

Wooden Pier at Fort Flagler State Park

Highlight • Structure

Fort Flagler State Park is a 1,451-acre park surrounded by saltwater shoreline. The park offers hiking and biking trails, campsites, boat launches, and historical buildings available for overnight stays. You can visit the park's museum, which features exhibits about the fort's history. The park provides unparalleled views of the Olympic and Cascade mountains and Puget Sound.

Tip by

B

7.81 km

End point

Parking

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Way Types & Surfaces

Way Types

4.62 km

2.29 km

862 m

< 100 m

Surfaces

5.41 km

1.76 km

608 m

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Elevation

Elevation

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Weather

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Today

Friday 8 May

13°C

8°C

0 %

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Max wind speed: 12.0 km/h

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Frequently Asked Questions

Where is the Anti-Aircraft Battery Trail, Bluff Trail, and Lagoon Loop located?

This scenic loop is situated within Fort Flagler State Park, offering a unique blend of history and natural beauty on Marrowstone Island, Washington.

What is the best time of year to hike this trail?

The trail is enjoyable year-round, but spring and fall often provide the most pleasant weather for hiking, with fewer crowds and comfortable temperatures. Summer is also popular, though it can be warmer.

Is the Anti-Aircraft Battery Trail, Bluff Trail, and Lagoon Loop dog-friendly?

Yes, dogs are generally permitted on trails within Fort Flagler State Park. However, they must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all visitors.

Are there any entrance fees or permits required for Fort Flagler State Park?

Yes, a Discover Pass is required for vehicle access to Fort Flagler State Park. You can purchase a day-use pass or an annual pass. Information on where to buy passes can typically be found on the Washington State Parks website.

What kind of terrain can I expect on the route?

The trail features varied terrain, including sections that pass by historic anti-aircraft battery remnants, coastal bluffs with potential views, and a serene lagoon loop. Expect a mix of compacted earth, possibly some gravel, and gentle elevation changes suitable for a moderate hike.

What can I see along the Anti-Aircraft Battery Trail, Bluff Trail, and Lagoon Loop?

Along the route, you'll encounter historical military structures, including remnants of anti-aircraft batteries. The trail also offers coastal views from the bluff sections and tranquil scenery around the lagoon. Don't miss the Wooden Pier at Fort Flagler State Park, a notable highlight.

Does the trail intersect other well-known paths?

Yes, the route incorporates sections of several named trails within Fort Flagler State Park, including the Bluff Trail, Anti-Aircraft Battery Trail, and Lagoon Trail, providing a comprehensive experience of the park's diverse landscapes.

How much time should I allocate for this hike?

Given its distance of approximately 7.8 kilometers and moderate difficulty, most hikers can expect to complete the loop in about 2 to 3 hours, depending on their pace and how often they stop to enjoy the sights.

Is the trail suitable for families with children?

With its moderate difficulty and interesting historical features, this trail can be suitable for families. The varied scenery and historical elements can keep younger hikers engaged, but be prepared for the full distance and some elevation changes.

What facilities are available at Fort Flagler State Park?

Fort Flagler State Park offers various amenities, including restrooms, picnic areas, and camping facilities. Check the park's official website for specific details on availability and any seasonal closures.

What should I bring for a hike on this loop?

For this moderate hike, it's advisable to bring water, snacks, appropriate footwear for varied terrain, and layers of clothing as coastal weather can change quickly. Binoculars can enhance wildlife viewing, and a camera is great for capturing the scenic views and historical sites.

Are there any viewpoints or landmarks along the way?

Absolutely. The bluff sections offer potential panoramic views of the water and surrounding landscape. The historical anti-aircraft battery sites themselves are significant landmarks, providing a glimpse into the area's past. The Wooden Pier at Fort Flagler State Park is also a key point of interest.

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