Protesters take to the streets in support of National Park workers who've lost their jobs after a chaotic week for the NPS

Metal National Park Sign on Gate at entrance to Saguaro wilderness.

Protesters across the US have taken to the streets after job cuts that have plunged America's 63 national parks into chaos before the peak summer season.

Hundreds gathered at an entrance to the Rocky Mountains National Park in Colorado to defend more than 2,000 National Park Service employees, who've reportedly had their seasonal job offers rescinded in the past month.