DENVER – The Colorado River runs through both – or, at least, near both – Denver and San Luis Río Colorado, Mexico. That makes them river sisters.

More precisely, a new partnership signed last week to strengthen protections and restoration of the vital body of water makes them river sisters.

Denver Mayor Michael Hancock signed a memo of understanding with Mayor José Enrique Reina Lizárraga last week establishing the River Sisters Partnership and highlighting the diverse populations that depend on the Colorado River, both said.

“As our climate continues to change, so do the challenges and responsibilities that come with water restoration and water-related crises that take place around the world,” Hancock said.

The Colorado River, which starts at its source high in the Rocky Mountains and snakes nearly 1,500 miles south into Mexico, is an vital source of water for millions of people across several U.S. and Mexican states, Hancock said.

“As River Sisters, we’re committed to researching and developing innovative water restoration projects, cultural events and initiatives that celebrate the unique contributions to the greater Colorado River Basin region.”

The partnership will highlight how the Colorado River enhances quality of life, culture and economic development for those on both sides of the United States-Mexico border.

The cities will also partner with the Cocopah Indian Tribe-Mexico; the Water, Wastewater and Sanitation Utility of San Luis Rio, Colorado; and Denver Water among others. The partnership will also establish a River Sisters Council to coordinate projects and events.