Chip Collins posted the route:

Hells Canyon Rim to Rim to Rim, from Windy Saddle Campground (Idaho) down to the Snake River (swim across) climb up (on the Oregon side) to Hat Point, OR. 

backpacker.com decribes this 18-mile route in the Sawtooth National Recreation Area. "You might think you're in Yosemite except of the lack of crowds."

Will Porter posted the route with some great details:

Fastest ascents to either the top of the iconic Y above BYU campus in Provo, Utah, or to the top of Y Mountain itself, using the established Y Mountain Trail - people need to be clear exactly which their time refers to.  To the summit via the Y Mountain Trail has a Strava segment.

Learn more about the Y from BYU Magazine's article "An Ode to the Y."

The Flagstaff Loop Trail seems to be still in process, but there appears to be enough on the ground for people to begin reporting FKTs. ~45 miles