This loop hike starts at Chester Lake parking lot. Take one of the x-country ski trails and initially continue east and then north towards Headwall Lakes.
Continue past Headwall Lakes along the valley and ascent up the col and steep up to the Fortress summit, the last few meters requires some easy scrambling and use of your hands. On decent from the summit after reaching the col decent west into the Chester lake valley along steep sandy scree.
Continue to the Chester Lake and hike out taking well marked trail from the lake area back to the parking lot.
From Calgary drive west until Hwy 40 and continue south towards Peter Lougheed Provincial Park, turn west and drive along Smith Dorrien Trail gravel road aprox 24 km to the Chester Lake parking lot found on the right side of the road.
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