Some of this information is 2-3 years old. Remember a lake that had fish once may not have fish now. Some of the back country lakes are stocked(fingerlings) and have no natural reproducing populations. Usually, one can look at a Topo and get a rough idea whether it will hold any natural reproducing populations (look for an inlet with a fairly low gradient). The high country provides the solitude the sport deserves. Below you will find a list of some of the back country lakes I have fished:

Holy Cross Wilderness

Topo Map

Lake Constantine

This is a beautiful lake full of brook trout. It is an easy hike of about 4-5 mileson the Fall Creek Trail. The drive into the trail head is quite rough. While you can make it in with a car with low clearance your better off with a vehicle that has high clearance. Because it is an easy hike the lake does see a lot of activity. On major holidays go up on Friday morning to get a good campsite.

Lower Tuhare Lake

These lakes are located about a mile from Lake Constantine. The trail is quite steep and very rough. The lower lake has beautiful cutthrout trout. If you don't have any luck in the lower lake try the pool down below. I have not fished the upper lake, but will try to get into it next year.

Seven Sisters

This is great hike up over the Fall Creek Pass. I only fished one of the lakes, but I believe they all hold tons of brook trout. This is the only time I've ever caught two fish on one cast. Using a dry fly and a nymph I had one fish take the dry and another take the nymph.

Fancy Lake

Tons of fish in this lake, but I did not catch a one. I only fished it for about an 30 minutes last summer on a day hike we did. One of the best day hikes is the Missouri Lake Trail up over Missouri Pass, and then back over Fancy Pass (9 miles round trip). The view from Missouri Pass of the Cross Creek Valley is spectacular. The road into the trail head is in very good shape.

Missouri Lakes

The southern most lake has some huge fish that are virtually impossible to catch. A good place to catch some nice size cutthrouts is the outlet of the south lake. The northern lake is full of eager brookies. The middle lake is fished pretty hard. Another is the pool near the Missouri Creek Diversion pipe. This area is gorgeous, but very popular. This is not the place to go if you want solitude.

Treasure Vault Lake

This lake has some very nice sized cutthroats. It is not fished nearly as much as the Missouri Lakes, because you have to go either hike up the cross creek trail or go over either Fancy or Missouri passes. It can be a bit windy here, since you are above tree line.

Strawberry Lake

The trail from Eagle Lake is not well maintained. Exceptional fishing at this lake. In about 2 hours I caught about 15 cutthrouts all between 12-16 inches. This fairly narrow valley is very beautiful.

Fairview Lake

A lot of brook trout in this lake with some cutthrouts mixed in.

Halfmoon Lake

Mostly brook trout here.

Eagle Lake

Mostly brook trout in this lake also. It is fairly shallow lake. The camping area is situated on a little bluff above the lake and is quite nice.

Big Pine Lake and Big Lake

Very good fishing for Cutts here. Extremely difficult hike in. The first 6 miles or so there is a nice trail then you have about a 1-2 mile cross country over tons of deadfall with a fairly steep grade. To give you an idea of the difficulty the first 6 miles took me about 3 hours. The last mile also took about 3 hours. If you do go you probably will not see another soul once you leave the main trail. There was a trail up to these lakes, but it is not maintained and I hate to ever refer to it as a trail.
There are a number of lakes here, but I believe only Big Pine Lake and Big Lake(near Horseshoe Lake) contained any fish.

Indian Peaks Wilderness

Topo Map
Diamond Lake

This from a faint memory. But I believe this lake contains rainbows.

Lost Lake

Mostly brook trout with some rainbows. This lake is fished fairly hard because it is a short hike in from the Hessie trail head.

Gourd Lake

I've had exceptional good luck fishing this lake. The best fishing is/was in the pool below the outlet. The lake itself is very deep and has afforded me some good fishing itself, although the last time proved to be a bust for me. You will probably not see many other people if you go up to this lake. There are two ways to get to this lake. From the east you can go over Buchannan Pass. From the west you can take the Buchannan Trail. No matter which way you go it is a tough hike. When hiking from the west the last 2 miles has some serious elevation gain.

Island Lake

I've not caught any fish in this lake (it was very windy), but have had very good luck in the pools, and ponds down below it. These pools are loaded with eager cutthrouts in the 12-16 inch range. This is a great place to go for some solitude since there is no maintained trail to the lake. Easiest access is from Gourd lake.

Bob Lake

Some great big trout, if you can find them, are in this lake. May not have a self reproducing population. All cutthroats.

Betty Lake

A lot of small eager cutthroats here. This lake has an inlet that allows the cutts to reproduce. Both Bob and Betty are easy to access via the trail from Rollins Pass. Its perhaps a 2 mile hike at most.

King Lake

A lot of rainbows in here, fishing can be tough as this lake is fished often and hard because of the easy access. This lake is even closer to Rollins Pass than either Bob or Betty, maybe 1 mile max.

Coney Lake

Cutthroats in both Upper and Lower Coney

Rawah Wilderness

Topo

I've fished many of these lakes. This is great place to backpack if you love to fish as there are plenty of water. Also, keep your eyes peeled for moose. Because this is a very wet area there seem to be quite a few around.

McIntyre Lake

There are definately some brook trout in here, I also think there maybe some lake trout.

Sugar Bowl Lake

This lake has both lake trout and brook trout. When ever you have both the lake trout keep the brook trout population under control, and thus the brookies will often get bigger.

Lost Lake

There are a lot of small brook trout in this lake. Interestingly this is the only place I've seen a Pine Marten in the wilderness.

Blue Lake

Cutthroats, and I believe Rainbows. This is a fairly easy hike in of about 5 miles. Because of this it gets a fair amount of traffic, and camping near the lake if prohibited. Very pretty area.

Twin Crater Lakes

Cutthroat were here the one time I visited. An extremely pretty lake that is above the timberline.

Big Rainbow Lake

This did have a lot of cuts and rainbows. There is no self reproducing population, and when I visited last year there were no fish in the lake.

Little Rainbow Lake

Okay there were no Rainbows in this lake when I visited, but some very big brook trout as I recall.

Rawah No 1 and 2

Lots of eager little brook trout here.

Sandbar Lakes

All brookies in here. Rather stunted as I recall.

Upper Camp Lake

A very deep lake that holds some pretty nice lake trout.