Athabasca River Concretions

Overview

On a remote stretch of the Athabasca River, you can walk among some of Canada's, and possibly the world's, greatest examples of spheroid boulders. The massive concretions litter the river valley at this location by the thousands. These incredible natural formations are a geological wonder and a photographer's dream. Exposed by natural erosion from the sandstone banks in which they grew over millennia, they have come to form the awe-inspiring Class VI Grand Rapids. Grand Rapids Wilderness Adventures is the sole provider of guided trips into this wilderness paradise. Trips include: transportation, meals and log cabin accommodations.