Window Trail is one of Big Bend National Park's standout hiking destinations, winding through TX's diverse terrain. The trail covers 5.6 miles with 800 feet of elevation change, making it a moderate outing suitable for most trail users. Trail stats: 5.6 miles, 800ft elevation gain, Moderate difficulty. Surface: Rocky. Trail type: Out-and-Back. Estimated time: 3-4 hours. Fee: $35 NPS fee. Dogs: Yes, on leash. Permit: No. Wildlife in the area includes ringtail cats, canyon wrens, mule deer. Keep your eyes open and maintain a respectful distance from any animals you encounter. Best seasons: Fall through spring; the pour-off view is spectacular. Recommended gear: sturdy trail shoes, 2+ liters of water, sunscreen, and a trail map. In summer, an early start beats the heat on this exposed TX trail. Practice Leave No Trace: pack out all waste, stay on the marked trail, and leave rocks and plants undisturbed.