Hi folks, I found a GPS watch today at Glacier Basin. It was under at the side of the main trail, about 100 m past the camp, at the first spur down onto Interglacier. Turned it into White River Ranger Station. Call the main MRNP number to claim. You'll probably need to give make/model.
And for what it's worth, skiing was great. Skied from prow about 10. Warm temps meant early corn. Best turns where found in Ruth Chutes.