Wow, thanks for this Steve. One thing I have noticed is that for whatever reason, some of the Eastern Sierra moths are more saturated in color than those I see online. It could be that they are super-fresh or maybe there's something about the Eastern Sierra that provides that. In any case I'm having fun with all of this & am very appreciative of your help!

Hi Steve
Thanks for this id and all my others! Can Tridepia nova be ruled out? Although the not-so-round orbicular spot fits, this moth doesn’t have the jagged terminal lines that Anarta mutata has. (I’m sorry, I’ve yet to learn the names of the features on the moths). I read that the two are similar & Jim Vargo’s image on MPG at least visually looks close to be a close match as well.

http://mothphotographersgroup.msstate.edu/species.php?hodges=10253

Glad you brought Tridepia to my attention. I had not considered it. However, after review of that species on BG, MPG and Pacific Northwest Moths, I still believe this is Anarta mutata. First of all, T. nova is consistently paler tan in color compared to mutata. Also, as you say, the terminal line is more prominent and toothed in mutata, and has an obvious 'W' toward the outer margin which I can clearly see on your moth. Your moth may not have as much in the way of dark chevrons pointing up from the terminal line as seen in other examples of mutata, but the species does vary in that characteristic. Now that I know of the similarities of these two species, I will inlcude them in their 'See Also' sections on BugGuide.