If you're hiking to Emerald Lake, Nymph Lake is the first of 3 lakes you will encounter on the trail. A moderate 0.5 mile hike, Nymph Lake is nice - but comparing it to what you'll experience further along the trail, Nymph is like a "starter lake" - they keep getting grander the farther along you go.
If you don't want to go farther than Nymph Lake, it's still a pretty spot to stop and enjoy. The worst part of the hike for me was that first 0.5 miles. Was still a bit rough the entire way, but it didn't compare to that beginning.
Located on the Bear Lake Road, you will need separate reservations to access the road in addition to the reservations to enter the park. The trailhead of Nymph Lake is at the Glacier Gorge Trailhead at the end of Bear Lake Road. It is a large parking lot, but some of Bear Lake's best hikes are all accessible from this parking lot. If it's full, they do have a park & ride location and the shuttle will bring you into the lot.
It does get hot and there is not shade throughout the trail. So make sure to bring plenty of water, a hat, some sunscreen, and (of course) some food. But don't forget to pack in and pack out!
Highly recommend hiking to Nymph Lake and all the way to Emerald Lake if you can. read more