A beautiful trail! The first half is a little grungy, with some short technical sections but probably 90% of the trail is super runnable. The second half in the American River canyon is gorgeous.
I used the gpx track from the Strava segment for this route. I think whoever posted it on the FKT website drew it on a map, because that route follows the biking trail, whereas the Strava segment follows the hiking trail (which goes through the most technical section). The difference in distance is negligible.
I think I was overreaching a bit, as I was on the tail end of my race fitness for the season. Tapering too many times just gets you out of shape I think!
Otherwise it was a super fun trail to bomb down, and very runnable on the way up.
Whoever posted this also put up some dire warnings of running it in the heat, so I figured a cold snap in November was a good choice. It was 38 degrees at the trailhead when I arrived, but for my race effort at 10am, i was running in a t-shirt, mostly in the sun, in 40 degree air temps. Perfect conditions!