Growing in cracks in basalt, with overhanging walls.
The leaves look like Ceanothus pumilus, but the flowers look like Ceanothus cuneatus. The growth habit is somewhere in between. Possibly a hybrid? (Possibly Ceanothus ×humboldtensis?)
I found another one along Whiskey Creek Road: #111180006
Apparent hybrid with Ceanothus cuneatus
P. aquilonis or P. huronensis?
P. cinicola or P. procerus?
S. obtusatum, S. oregonense, or S. sanhedrinum?
Style relatively long and definitely hairy. We saw tons and tons of these at this site and elsewhere, and there was wide variation in plant height and petal length, but every stigma I looked at had hairs, which would seem to rule out P. leonis.
Note to self: there are some interesting ID notes at https://www.fs.fed.us/r6/sfpnw/issssp/documents2/inv-rpt-va-phacelia-leonis-rrs-2013.pdf