Horton Park is a small arboretum in Saint Paul, Minnesota, United States. Known primarily for its variety of trees, Horton Park has become a symbol of the Saint Paul Midway community. Founded in 1895 by James R. Horton, Horton Park was used for public hearings. It is now used as a popular location among local St Paul residents for picnics and genera…Horton Park is a small arboretum in Saint Paul, Minnesota, United States. Known primarily for its variety of trees, Horton Park has become a symbol of the Saint Paul Midway community. Founded in 1895 by James R. Horton, Horton Park was used for public hearings. It is now used as a popular location among local St Paul residents for picnics and general relaxation.