You can't pinpoint the exact GPS coordinates of Mt. St. Helens National Volcanic Monument. It's a large area, and its borders are not easily defined by a single set of coordinates.

However, I can give you the coordinates for the visitor center:

* Latitude: 46.1933° N

* Longitude: 122.1994° W

This will get you to the Mount St. Helens Visitor Center, a good starting point for your visit. You can also find detailed maps on the National Park Service website for the park itself.