Water vs. Rock

© Photographed September 10, 2016
Erected by Wisconsin Interstate Park
St. Croix Falls, Polk County, Wisconsin
45.396050, -92.643950 (park entrance)
45.400111, -92.647499 (Pothole Trail trail head)
45.399532, -92.649712 (marker location)

Water vs. Rock
This spot was once the scene of a tremendous clash of forces. Rushing water smashed into the rock formations you see around you and formed this gorge. What could create such a mighty torrent of water?

About 10,000 years ago, a warming climate caused continental ice sheets to melt. The meltwaters formed Glacial Lake Duluth. Enormous quantities of water drained in torrents down an outlet that would become the St. Croix River.

The charging waters collided with ancient volcanic rock that stood here. Blocks of this rock formation, weakened by angular fractures, broke away under the water pressure. This action created the steep-walled gorge in front of you -- the Dalles of the St. Croix. 
The marker is located on the grounds of Interstate Park (park of the Wisconsin State Park system), on the Pothole Trail. The entrance to the park is at the intersection of Park Road and South Vincent Street / Highway 35, St. Croix Falls, Wisconsin 54024.

NOTE: The marker is inside the park; entrance to the park requires (1) an annual pass or (2) a day permit to access the marker. Click here for more fees information.





Stand in the overlook and look to your right. Do you see the outline of the face in the "Old Man of the Dalles" formation?
Screenshot of vintage postcard provided by CardCow.com.

Screenshot of vintage postcard provided by CardCow.com.
Old Man of the Dalles, St. Croix Falls, Wis.

 Screenshot of vintage postcard provided by CardCow.com.
Dalles of the St. Croix from Anthony Rock, St. Croix Falls, Wis.

Looking south at the St. Croix River.

Can you see the girl sitting on the top / edge of the bluff.


A treacherous climb over the rocks to get to the marker.


The steps leading down to the marker.

More steep steps . . .

The steps are almost as high as Dexter.

The marker is along the St. Croix River.

The marker is on the Pothole Trail.

The Pothold Trail trail head . . . it's about 10 minutes to 
the marker location.

The marker is located inside Interstate Park.

The marker is located in St. Croix Falls, Wisconsin.

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