On your way to or from the Johnston Ridge Observatory take a side-trip to Coldwater Lake formed by an avalanche during the volcano’s eruption. The lake is just a short distance off the highway. You’ll find a parking area with paths to the lake; restroom, boat launch (electric motors only) and trails (don’t throw away that wrist-band!). You will need them as proof that you’ve paid to visit or hike the trails inside the Mount St Helens National Volcanic Monument. There are also hiking trails around Coldwater Lake Coldwater Lake provides a tranquil ending to a long and scenic experience through a landscape that must be seen to believe.

The Johnston Ridge Observatory is open seasonally and is located on Johnston Ridge in the center of the 1980 blast zone approximately 8 km (5 mi) north of the Mount St. Helens summit. The Ridge was named in honor of David Johnston, the USGS volcanologist who was on duty at the USGS Coldwater II observation point during the May 18, 1980 eruption. He was one of 57 people who lost their lives in the eruption. The Observatory building houses seismic, deformation, and other monitoring equipment that relays data to the USGS Cascades Volcano Observatory for analysis.

After this stop , we will head back - 3 hours drive time to drop off locations A barrier-free, paved hike of less than one mile from the Johnston Ridge Observatory. The trail includes interpretive kiosks and 360 views of Mount St. Helens and the surrounding blast zone.