Fort Flagler State Park is a 1,451-acre park located on the northeast tip of Marrowstone Island in Jefferson County, Washington. The park offers a variety of activities and attractions for visitors, including hiking, camping, boating, and historical landmarks.

One of the main reasons to visit Fort Flagler State Park is for its historical significance. The park was originally a military fort built in the late 1800s to protect the Puget Sound from foreign invasion. Visitors can explore the old gun emplacements, barracks, and officers' quarters that remain on the site.

Another popular attraction at the park is the beach. The park has over two miles of saltwater shoreline, with opportunities for swimming, fishing, and clamming. There is also a boat launch for those who want to explore the surrounding waters.

In addition to these activities, Fort Flagler State Park has several hiking trails that offer scenic views of the surrounding area. The trails vary in difficulty and length, making them accessible to visitors of all skill levels.

The best time of year to visit Fort Flagler State Park is during the summer months when the weather is warm and dry. However, visitors should be aware that the park can get crowded during this time, so it is best to reserve camping and picnic areas in advance.

Overall, Fort Flagler State Park offers a unique blend of history, nature, and outdoor recreation that make it an ideal destination for visitors to the Pacific Northwest.