Blue Trail is a hiking, biking, and horse trail in San Marcos, Texas. It is within Purgatory Creek Greenspace. It is a mile long and begins at 666 feet altitude. Traveling the entire trail is 1.1 miles with a total elevation gain of 142 feet. Near the trailhead there is parking. The Learning Tree attraction can be seen along the trail. There is also a picnic site along the trail.
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