Katy Trail | Friends of Katy Trail, Privately funded and supported by the community, the historic Katy Trail is built on an old railroad line and has quickly become an iconic destination for the people of Dallas. The Friends of the Katy Trail organization is the principal fundraiser for the Trail. Through generous donations and private support from businesses and individuals, the Katy Trail remains in peak condition for residents and visitors alike to enjoy Dallas' beautiful, natural trail.The Katy Trail is 100% community sup.