Standing water in the Arctic and subarctic supports concentrations of birds during the breeding season — waterfowl that nest in the marsh vegetation, shorebirds that use the lake margins — and fish in the lake and river systems.

These resources would have been highly attractive to people who could exploit them, representing reliable seasonal concentrations of food that mobile hunter-gatherers could plan around.

The limestone ridges where the Trail Creek Caves are located provided vantage points over the surrounding landscape — elevated positions from which the lake and its margins could be observed, and from which movement of animals across the tundra could be monitored.

Such vantage points are practically valuable for hunter-gatherers who need to locate prey animals across broad landscapes, and the combination of shelter (the cave), proximity to water resources (the lake below), and elevated observation position (the ridge) would have made this specific location attractive for repeated use.