Willapa National Wildlife Refuge, located in the state of Washington, is a beautiful and diverse natural area that offers a range of recreational activities and unique features. Here is a summary of the refuge's highlights, supported by information from multiple reliable sources:

Reasons to Visit:
1. Biodiversity: Willapa National Wildlife Refuge is known for its rich biodiversity, providing a sanctuary for numerous plant and animal species. It offers an opportunity to observe and appreciate a variety of habitats, including tidal marshes, old-growth forests, freshwater wetlands, and coastal dunes.
2. Birdwatching: The refuge is a renowned birdwatching destination, attracting bird enthusiasts from around the country. Over 200 bird species have been recorded here, including shorebirds, waterfowl, raptors, and migratory birds.
3. Scenic Beauty: The refuge's diverse landscapes offer stunning scenery, with picturesque views of the Pacific Ocean, meandering rivers, and lush forests. Visitors can enjoy tranquil walks, photography, and nature exploration.
4. Recreational Opportunities: Willapa National Wildlife Refuge provides a range of outdoor activities such as hiking, wildlife observation, hunting, fishing, boating, and kayaking, making it an ideal place for nature lovers and outdoor enthusiasts.

Points of Interest:
1. Long Island Unit: Located in the Willapa Bay, this unit features stunning views of the bay, intertidal flats, and salt marshes. It is an important habitat for migratory birds and offers opportunities for birdwatching, fishing, and boating.
2. Leadbetter Point Unit: Situated at the northernmost tip of the Long Beach Peninsula, this unit encompasses sand dunes, coastal forest, and open ocean beaches. It is an excellent spot for hiking, beachcombing, camping, and wildlife observation.
3. Niawiakum River Unit: This unit features diverse habitats, including tidal marshes, freshwater marshes, and upland forests. It offers opportunities for birdwatching, photography, and scenic walks along the river.

Interesting Facts:
1. Willapa National Wildlife Refuge covers approximately 15,000 acres of land, consisting of six units across Pacific and Wahkiakum counties in Washington.
2. The refuge provides critical habitat for endangered species such as the snowy plover, marbled murrelet, and Oregon silverspot butterfly.
3. Willapa Bay, adjacent to the refuge, is one of the largest estuaries on the Pacific Coast and supports abundant marine and estuarine life.

Best Time to Visit:
The best time to visit Willapa National Wildlife Refuge depends on individual preferences and desired activities. Spring and fall are generally considered ideal for birdwatching, as migratory birds pass through the area. Summer offers pleasant weather for hiking and outdoor activities, while winter attracts visitors for the peaceful atmosphere and wildlife viewing opportunities.

Sources:
1. U.S. Fish and Wildlife Service - Willapa National Wildlife Refuge
2. Washington Trails Association - Willapa National Wildlife Refuge
3. Audubon - Willapa National Wildlife Refuge
4. Pacific County Tourism - Willapa National Wildlife Refuge