Summit County plans to be tops in more than Colorado peaks, this week becoming the state’s first county to commit to getting all its power from renewable sources by 2035.

“It’s exciting to see the first countywide commitment to a clean, renewable energy future in Colorado,” said Jim Alexee, director of the Colorado Sierra Club. “It’s imperative we take bold action on climate in order to protect our health and the livelihoods of the many communities in Colorado that depend on a ski economy, which is already suffering from the consequences of a changing climate.”

The Summit County Commission unanimously approved a resolution Tuesday to get off fossil fuels. Two gubernatorial candidates, Democratic Michael Johnston and Jared Polis, are promising to get the state to all-renewable energy sources by 2040.

The Colorado leader becomes only the fifth county in the nation to set the goal via the Sierra Club’s Ready for 100 campaign, according to the Colorado chapter of the club.

Fifty-eight municipalities nationwide have made the same commitment. Longmont became Colorado’s seventh city on the list last month.

“If there’s one thing that’s becoming very clear, it’s that climate action requires strong partnerships and effective collaboration across all sectors,” County Commissioner Dan Gibbs said in a statement. “We’re very excited to work together with our utility providers and our local, state and regional partners to achieve this goal in an efficient and cost-effective manner.”