Texas State Highway 21 is a significant roadway in the state of Texas, stretching approximately 140 miles. It runs east-west, connecting the cities of Nacogdoches and Bastrop. The highway serves as an important route for both local traffic and travelers exploring the region. The highway passes through various landscapes, including forests and rural areas, showcasing the natural beauty of East Texas. Along its route, it intersects with several other major roads, providing access to nearby towns and attractions, making it a vital part of the state's transportation network.