This morning I hiked the 1.9 mile Canyon View Loop Trail in Towsley Canyon neat Santa Clarita, CA. My total hike from the parking lot, to the trailhead, over the trail and back was 2.6 miles. I don't know what the elevation increase was on this trail, but I know it got pretty high up. I could also tell that I had not been out on a "strenuous" hike for awhile because my heart was pounding, I was gasping for breath and I had to stop and rest several times on the climb up, but once I hit the summit and started back down, I had no problem.