TMC A-Mountain Half Marathon + Cigna Healthcare 4-Miler + Family Mile 2026

The TMC A-Mountain Half Marathon is an October running event in Tucson, Arizona, held at the Mercado Annex, 267 S Avenida del Convento, near Sentinel Peak. The main event is a 21.1 km half marathon, with a 6.4 km Cigna Healthcare 4-Miler and a 1.6 km Family Mile offering shorter distances. The half marathon course follows A-Mountain and the Santa Cruz Riverpath, combining a local landmark with a flatter section for faster running. The COX Charities and SAR FitKidz Mile supports children and families, while the half marathon provides the full 13.1-mile challenge from the west-side event hub.