Oasis on the High Plains Within the dry and windswept high plains of the Texas Panhandle lies a hidden oasis, a welcoming haven where wildlife and humans find respite from the dry grasslands above. Through this plain, the Canadian River has cut dramatic 200-foot canyons, or breaks, where humans have eked out a living for over 13,000 years. Lake Meredith now occupies these hidden coves where early humans once roamed.