The park is an outstanding example of Edwards Plateau flora and fauna. It is a combination of steep, rugged limestone canyons; springs; plateau grasslands; wooded slopes; and clear streams. It features a large, isolated stand of uncommon Uvalde bigtooth maple, whose fall foliage can be spectacular. Generally, the foliage changes the last two weeks of October through the first two weeks of November. The park is extremely popular during the fall and is often crowded. Parking is limited to 250 cars, so for maximum enjoyment and serenity, we suggest visitors schedule trips during the weekdays, if possible.
Rare species of birds, such as the green kingfisher, can be seen year-round. The endangered black-capped vireo and Golden-cheeked warbler nest and feed in the park in spring and early summer. Wild animals include gray fox, white-tailed deer, armadillo, raccoon, bobcat, rock squirrel and javelina.
More information on wildlife mentioned here: Texas Wildlife Factsheets