Could it be Clarkia unguiculata ?

Probably a double variant in which case photos of normal single flowers of whatever plant it is will never quite match. However do look at the species suggested above to see if petal shapes and the green beaks - presumably developing fruits - are the same.

If you had habit and leaf photos that would help a lot.

Castilleja rhexifolia?

nonmember nailed it!! Very nice :-)

In which case it's a flower head rather than a single flower

took me 3 days to figure out what RMNP meant ... go figure