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This 7-mile run into Boynton Canyon is relatively flat, allowing you to cover the ground very quickly.
This route only gains 1,119 vertical feet round trip.
Some sections of this trail are flat and sandy, making for easy running through exposed sections. Soon you'll find yourself running through the heart of the canyon, with towering red rock cliffs on all sides! This run includes an optional side quest to find the Subway Cave.
This cave used to be a local secret...
but it's a secret no longer.
Boynton Canyon is now one of the most popular trails in all of Sedona, primarily due to the Subway Cave.
The final scramble up to the cave is a bit more challenging and technical than the rest of the trail, but most people will be able to accomplish it with no problem. Sources: https://www.earthtrekkers.com/how-to-hike-boynton-canyon-subway-cave/