The Trinity River National Wildlife Refuge is actually located in the state of Texas, not Oklahoma. Located just 45 miles northeast of Houston, this refuge is a hidden gem offering a variety of reasons to visit, points of interest, and interesting facts for nature enthusiasts.

Reasons to Visit:
1. Biodiversity: The refuge encompasses approximately 30,000 acres of diverse ecosystems, including bottomland hardwood forests, wetlands, prairies, and riverside habitats. It provides a sanctuary for a wide range of plant and animal species, making it a great spot for birdwatching, wildlife photography, and nature observation.
2. Birdwatching: With over 230 bird species recorded, the refuge is a birdwatcher's paradise. It serves as an important stopover for migratory birds, including the endangered whooping crane and bald eagle.
3. Recreational Activities: The refuge offers various recreational activities such as hiking, fishing, hunting, wildlife photography, and boating, providing visitors with opportunities to explore and engage with nature.

Points of Interest:
1. Champion Lake: This 750-acre lake offers excellent opportunities for fishing, boating, and wildlife observation. It is home to a variety of waterfowl and wading birds.
2. Wildlife Drive: The White Lake Wetlands Conservation Area features a 5.25-mile Wildlife Drive loop, which allows visitors to explore the wetlands by car or bike, providing excellent opportunities for wildlife viewing.
3. Big Slough Trail: This 2.5-mile trail takes hikers through a diverse range of habitats and provides a chance to see various wildlife species, including alligators and turtles.

Interesting Facts:
1. The Trinity River National Wildlife Refuge was established in 1994 to protect and restore vital bottomland hardwood forest habitats along the Trinity River.
2. It is one of the few national wildlife refuges in the United States located within the boundaries of a major metropolitan area.
3. The refuge also serves as a living laboratory for scientific research and environmental education programs.

Best Time to Visit:
The best time to visit the Trinity River National Wildlife Refuge is during the fall and winter months (October to February). This is when migratory birds are most abundant, including waterfowl and bald eagles. Spring is also a good time to visit as wildflowers bloom and bird activity increases. Summers can be hot and humid, but it is still possible to spot wildlife and enjoy recreational activities.

Please note that the information provided here is based on general knowledge and should be cross-checked with official sources for the most accurate and up-to-date information.