While descending a meadow/talus ridge we heard warning whistles that I recognized as being from marmots. We saw three individuals dashing to the cover of nearby large boulders. After staying quiet and sitting for a couple of minutes we saw them climb the boulders to look at us.
I managed to get these pictures and some decent quality video from a distance before quickly moving on so as not to overly bother them.
After reporting this observation to the Marmot Recovery Foundation it turns out that there are no post-decline records of marmots from this area. That would make this a newly documented population. It was mentioned that there is a possibility that one of the marmots is younger which could be evidence of successful reproduction.