Honor Height Park in Muskogee has a couple of trails--short, but very scenic. Go during march-April, and you'll see the most beautiful azaleas on the planet. During December, Honor Height Park puts on a Christmas light show that will astound you. Honor Heights is home to three trails: Henry Bresser Nature Trail, the Audubon Trail, and the Stem Beach Trail.
In August, my friend Joel Everett has a 5K and 10K there--the Waterloop Trail Run. You'll enjoy the trailz, and a wetdown in the park fountains. Sounds fun.