Sonnette is located near Broadus, at the edge of the Custer National Forest. Sonnette is on Pumpkin Creek. The forest service land near the town offers a variety of topography, varying from rolling grasslands to steep rock outcrops. Vegetation varies from prairie to dense stands of ponderosa pine. In nearby Ashland, visitors can tour the St. Labre Indian School. It made a humble beginning in 1884 with the construction of a log cabin school operated by four Ursuline Sisters.