Saint Anthony offers 10,600 acres of white quartz sand for off-road enthusiasts. Winds carried the sand from the nearby Teton and Snake Rivers and placed them as dunes among the hills. These hills were once active volcanic vents.

Saint Anthony offers 10,600 acres of white quartz sand for off-road enthusiasts.

Winds carried the sand from the nearby Teton and Snake Rivers and deposited them as dunes among the hills. These hills were once active volcanic vents.