We are in the process of planning a backpacking trip to Yellowstone. I have been trying to get GPS coords for the back country campsites but cannot find a comprehensive map/list showing all the coords. Does anyone know where I can find this info?

Here are some sites I found. Not sure if they will be useful or not...
Yellowstone National Park: Trip Finder
Yellowstone National Park
POI: Yellowstone National Park

One hike I would recommend to you is the Pebble Creek trail. It's the trail where BootsnAll was born.

Not exactly what I was looking for but these look like some good suggestions for some cool sights to check out. Thanx for the reply!

Not exactly sure why you need gps coordinates. You definitely won't get lost in the Yellowstone backcountry - the trails are VERY well marked. (good to know that your entrance fee goes to something productive.)

Is this for a blog or something? What is your project?