As per Yellowstone Public Radio (YPR), the only public info is that she was up on the Buttermilk Trail which is roughly 8 miles west of town, goes up to the Continental Divide. It's a very beary area, I have spent hours and hours up there for various reasons during the decade + that I lived there. In winter it's a major snowmobile route that takes you from that point to Island Park on the other side of the divide, heavily forested and heavenly beautiful with wildflowers and everything you would want to see in nature.
The identity is still not released, she was found so that means she was alone, big mistake in that area. Unless there was another victim who got carried off, unlikely as that may be.
A situation, rarely talked about, is that the park is swarming with humans and their vehicles, more every year, they are hiking and camping all over the place outside the park for 90 miles or better from the park boundary. The wildlife are getting stressed to the max by all the people and climate change, don't expect them to be happy to see you, they don't have anywhere else to go, though grizzles are migrating outward... back into the grasslands from whence they came a century ago.