Sad to hear the news about this young lady. I will be at this park in two weeks, so I had been bookmarking some hikes.
Some photos of the area around Grinnell Glacier are in this hiking article. Beautiful area, but the hike description sounds challenging. Not sure this is the same trail Jenn took, but it seems to be the right area.
“Start by hiking north from Logan Pass on Highline Trail. This incredibly scenic trail is pleasantly gradual, gaining just 500 feet over its first 6.8 miles.
After a long gentle descent, Highline Trail comes to its first marked junction, about 3/4 of a mile before Granite Park Chalet. To the right, Garden Wall Trail climbs a steep gravel slope toward the top of the divide. More challenging than anything that has come so far, this trail tackles 950 feet over 0.87 miles to a dip on the Continental Divide.
A sign at the junction lists the distance at 0.6 miles, but unfortunately this is an understatement. Take your time hiking up the rocky track, which is un-apologetically tough on tired legs.
https://www.hikespeak.com/trails/glacier-overlook-garden-wall-trail/