The Tiospaye Wakan, "Holy Family," service combines the Rite II Holy Eucharist of the Book of Common Prayer with the style and symbolism of Native American culture. Conducted in a circle, evoking the shape of the inside of a tipi, with a ceremonial fire in the center, this service provides an environment welcoming to many people who would otherwise feel uncomfortable in a traditional church setting. The room is decorated with the colors of the four direction and hangings that display symbols similar to what might be found on tipi liners.

Begun by the Rev. Dr. Martin Brokenleg on September 8, 1991, the Tiospaye Wakan service is one of three services offered each Sunday at Calvary Cathedral. Services are conducted by the Dean and deacons of the Cathedral each Sunday at noon. A potluck meal follows the service on the first Sunday of each month. Hospitality is a key ministry of this service and all are welcome to attend.