Excellent route! Tough with mostly single track, some quite technical with solid and loose rocks. I would agree this park is a "hidden gem". Semi-arid landscape. Canyon is interesting. Reservoir is fairly extensive with people in kayaks and row boats.
I'm on a road trip and saw this route just off I-80 so I did it. I am still not recovered from a long ultra so I set the bar quite low on this FKT. Someone can easily eclipse my time.
It was a hot day with high humidity and there is almost no shade on this route. There are a couple streams you cross however you'll need a filter and the stop would definitely impact your FKT time. I carried only 1 liter of fluid and ran out with 2 miles to go. I would recommend 1.5 liters on a hot day like today.