A plaque on West Blvd in front of the Old Pioneer Museum reads:
This 3-stage cache will take you to the top of Founders Rock. I been up there several times and haven't seen the marker that is mentioned, so I don't know if it's still around anymore.
Stage 1 (N44°05.278' W103°14.778')
A good place to park is on West Chicago Street in front of where the old meat packing plant used to be. Recently it has been cleaned up and there is a black canvas fence about 2 ft high. Walk along the south side of that fence and don't cross the gravel area because it is still private property. Once past the gravel area, take the well-graveled road on up to stage 1. When you are close, leave the road and take the trail. The coordinates of the 2nd stage are hidden in a small pill container.
At this point you will leave the main trail. The coordinates of the final stage are hidden in York mints tin. You will have to meander your way toward the final stage. There is a faint trail you can follow, but you might lose it a few times.
The letterbox is hidden near the sandstone cliff but not on it. After you have logged in, traded, and stamped up, rehide it the way you found it with wood only. I don't want to encourage anyone to take rocks from the cliff and use them for cache camo for obvious reasons. From the cliff you should be able to see Harney Peak and possibly Storm Hill if you know where to look.
You will notice that people have carved their own name in the rock. Please respect the history of this place. Don't add your own name and tread lightly. Carve a stamp and put it in the cache if you want to carve something. It might be fun. :)
Don't forget to bring your personal letterboxing stamp, stamp pad, and log book if you have them! The box does not have an ink pad in it. If you're not familiar with letterboxing, you need to know that the stamp is not a trade item and stays with the cache.