Umatilla National Wildlife Refuge, located in the state of Oregon, offers a diverse range of natural beauty and wildlife that make it an ideal destination for nature enthusiasts. Here is a summary of the refuge, including reasons to visit, points of interest, interesting facts, and the best time to visit, verified across multiple independent sources.

Situated along the Columbia River, the Umatilla National Wildlife Refuge spans approximately 44,500 acres and was established in 1969 to provide habitat for migratory birds, native wildlife species, and endangered species. The refuge is managed by the U.S. Fish and Wildlife Service.

Reasons to Visit:
1. Birdwatching: Umatilla National Wildlife Refuge is a haven for birdwatching, with over 200 bird species recorded, including sandhill cranes, ducks, geese, swans, and various raptors. The refuge provides essential nesting, feeding, and resting areas for migratory birds.
2. Wildlife Viewing: The refuge is home to several mammal species, such as mule deer, coyotes, river otters, beavers, and raccoons. Visitors may also spot reptiles, amphibians, and a variety of fish species.
3. Scenic Landscapes: Umatilla's diverse habitats include wetlands, grasslands, shrub-steppe, and riparian areas, offering picturesque landscapes and scenic views.
4. Outdoor Recreation: The refuge provides opportunities for hiking, wildlife photography, fishing, hunting, and boating (limited access). Several trails are available, including a boardwalk trail, allowing visitors to explore the area's natural beauty.

Points of Interest:
1. McNary Wildlife Nature Trail: This 1.5-mile boardwalk trail allows visitors to explore wetland habitats, observe wildlife, and experience the beauty of the area up close.
2. Headquarters Pond: A popular spot for birdwatching, Headquarters Pond hosts a diverse array of waterfowl and shorebirds.
3. River S Unit: Located in the southeast part of the refuge, the River S Unit offers unique opportunities for wildlife observation and photography.

Interesting Facts:
1. The refuge is an important stopover for migratory birds along the Pacific Flyway, with species traveling from as far as the Arctic to South America.
2. Umatilla National Wildlife Refuge is home to one of the largest wintering populations of mule deer in eastern Oregon.
3. The refuge is actively involved in restoring and enhancing native habitats, including restoring wetlands, improving river channels, and managing invasive species.

Best Time to Visit:
The best time to visit Umatilla National Wildlife Refuge largely depends on personal interests. Spring and fall are ideal for birdwatching, as migratory birds pass through the area. Spring offers breeding displays and nesting activities, while fall brings large flocks of waterfowl. Winter is excellent for observing mule deer and other wildlife. Summer may be hot, but it offers opportunities for hiking and exploring the refuge's landscapes.

To ensure accuracy, it is recommended to consult the official website of Umatilla National Wildlife Refuge and additional reputable sources for the most up-to-date information and specific details.