This is the most popular day hike in the area. Horton Spring is an unusually large spring. Water literally gushes from the side of the rim supplying Horton Creek. Think of the Rim as a huge sponge and Horton Spring is the faucet. Okay on to the trail. Starting from the parking area cross the concrete bridge. Continue on the pavement up the hill heading towards the campgrounds. The trailhead is on the left side of this road. Check out the trail information and hit the trail. First you will go down and cross the creek. The creek is typically dry in this area as it runs underground in limestone caverns for the first half mile. The trail is wide and easy to follow as it's an old jeep trail. Before then it was just a narrow trail to connect homesteads in the area.
One of which was L.J. Horton, a cattlemen that settled near the creek. Horton lost his heard to thieves and never ranched again. The trail is fairly straight forward for the first three miles. In the final mile the trail switchbacks to ascend the hill. Just before the springs you will encounter an intersection with the Highline Trail #31. Go right from the intersection a short distance to reach the springs. The area here is lush, enjoy.
My sister claims to have walked the length of the creek. This would be a lot of fun though more exhausting. Many little waterfalls and some pools are encountered along the way. Keep in mind the going is much slower in the creek. Set aside the whole day for a creek venture. The trail is not too exerting energy wise. The elevation gain is vaguely noticed. Families with children over the age of ten frequently hike this trail on weekends.