A lost dog has been reunited with his owner after being missing for three days following a rollover crash on a mountain pass in Colorado that left a passenger seriously injured.

The search for the dog named Decker ended when a couple hiking in the area told family and friends searching for the pup that they heard "barking and howling," according to tweet from the San Miguel County Sheriff's Office.

The couple used a spotting scope to locate Decker. They then helped direct authorities to the 10-month-old puppy's location on steep terrain in the Telluride Peak area where he was uninjured and escorted back to safety. 

Decker was found about 700 vertical feet above where the Jeep Wrangler Sport rolled down several switchbacks on Black Bear Pass before coming to a stop on Bridal Veil Road in Telluride.

Those involved in the crash, both from the Durango area, include a 22-year-old male that suffered minor injuries and a 23-year-old female that suffered more serious traumatic injuries. She was airlifted to St. Mary's Hospital in Grand Junction where her current condition has not been released.

Decker has returned home thanks to the help of the local community, deputies, and search and rescue team members.

Black Bear Pass in the Telluride area is one of the most dangerous roads in Colorado due to technical terrain and steep drop-offs. The 4x4 road, also known as Forest Service Road 648, rises to an elevation of 12,840 feet.