Entering Glen Canyon NRA The first National Park unit one enters when driving to the Maze is not Canyonlands NP, but rather the Glen Canyon National Recreation Area. The boundary of Canyonlands National Park is much further along.
This image is from the presentation "An aMAZEing Trip to Color Country - The Maze, Escalante, and Zion - Flint Road and Teapot Canyon Jeeping".