Destined to have been nominated IMHO, and I got to it first:

Cactus to Clouds Trail, Mt. San Jacinto, Palm Springs, California. (Trailhead to summit, summit back to tram station, tram down from that point.) Plenty of information about this online, but about 23 miles in hiking, over two vertical miles in elevation gain. That elevation gain is what makes this hike unique.

If I wait until age 70 for that next major hike, I'm wondering if I should substitute this one in lieu of returning to Whitney for either the Mountaineer's Route or Main Trail again.