The trailhead is the Crystal Lake Trailhead off the Mirror Lake highway. This is at milepost 25.5, which is 25.5 from Kamas Utah on highway 150 or about 52 miles south of Evanston Wyoming on Highway 150. The trail will likely be very snowy until late June in most years.

At milepost 25.5, turn left onto the paved road signed from Trial Lake and Crystal Lake Trailhead. Stay left a short distance from the highway, but take the second right 0.7 miles from the highway. Follow this 0.5 miles to its end at the Crystal Lake Trailhead.

The trailhead has a pit toilet and a large parking. There are also several campground in the area.

To Long Lake (2 miles)
From the trailhead, find and follow the Lakes Country Trail. The trailhead parking is large, but the trailhead and trails are well signed. Just make sure you start on the correct trail. Crystal Lake will be on your left. Just 1/4 of a mile or so from the trailhead, the side trail to Cliff Lake leaves on the right; stay straight. You will soon encounter the small section of concentrated elevation gain, going up about 200 feet in a short distance.

After 1.7 miles from the trailhead, there is a junction that leads to Weir Lake and Marjorie Lake to the left. Continue straight on the trail toward Long Lake and Island Lake. You will soon encounter Long Lake, with a wide meadow and ample logs to sit on while enjoying the view. Mt. Watson can be seen to the northeast and an unnamed summit on the ridge to Long Peak to the north.

Side Trip: Long Pond (0.4 miles)
The walk to Long Pond is a short distance from Long Lake. Walk southwest along the trail on the south side of Long Lake, encountering a bridge over the outlet of the lake. Instead of crossing the bridge, signed for Island Lake, continue along the rocky use trail to Long Pond, which you will encounter in just a few minutes from Long Lake. Go back to Long Lake to continue on the loop.

To Duck Lake / Island Lake Jct (0.9 miles)
From Long Lake, the trail continues west. It has been re-routed higher than is shown on older USGS maps. It is just under a mile to the Duck Lake/Island Lake junction.

Side Trip: Island Lake (0.6 miles one-way)
From the junction, to visit Island Lake, go right. This section of trail is the other steep-ish section on the hike. It is about 0.6 miles and about 200 feet of elevation gain to reach Island Lake. Of the lakes in the area, Island was my favorite. A beautiful and, at least on our trip, very heavily used lake. Return to the Duck Lake Junction to continue the loop.

Duck Lake (0.5 mile)
You can see Duck Lake from the junction; it is about 1/2 mile downhill. There are a couple of side trails that go to the lake as well as several campsites.

Duck Lake Jct to Marjorie Lake Jct (1.75 miles)
Toward the south end of Duck Lake is a trail junction. Right goes to the lake and campsites; you want to go left here instead. The trail gains a bit of elevation as it passes Pot Lake and Weir Lake. Both lakes are small, but pretty, with a few small campsites near them.

The trail then begins a small ascent back up toward Long Lake. It reach a junction with the Provo River Trail and Marjorie Lake.

Side Trip: Marjorie Lake (1 mile one way)
To visit Marjorie Lake, go right. Follow the Provo River Trail about about 0.8 miles to the junction to Marjorie Lake. The lake is on the right at this final junction, in about 1/4 of a mile.

Continuing the Loop (0.25 miles back to the junction, then 1.7 more miles back to the trailhead)
Go left at the Provo River/Marjorie Lake junction and reach the Long Lake - Provo River Jct in just a few minutes. From there, go right and follow the same route you used from the Crystal Lake Trailhead to the junction on the way in.