White checkermallow (Sidalcea candida)
Found this on the Darling Creek Trail (SE of Ute Pass). The first photo is an iPhone photo from August 2019. I went back on Aug. 21, 2021 and missed it on ascent as there was a lot of deadfall on the trail and I was off-trail at the location. But on descent I stuck to the trail and found it. Just one plant. The second photo is with my camera.
Next is the same spot, August 15, 2022.
Finally, on July 10, 2023, I found this specimen two feet from the bike path (east side of path), behind the high school, in dry gravelly terrain, between Frisco and Breckenridge.