A Lincoln County rancher out checking cattle Monday morning found human remains in a ravine, and local authorities were trying to determine whether they are those of a 75-year-old man who disappeared in 2014.

Lincoln County Sheriff Tom Nestor told 9NEWS that there was no evidence to suggest the remains are those of Gene Ostrander, who vanished after last being seen at his home in Arriba, a town along Interstate 70 about 25 miles east of Limon.

At the same time, Nestor said Ostrander is an obvious possibility.

“He’s the only missing person in the area,” Nestor said.

Ostrander was last seen wearing blue jeans, work boots and a “shiny” belt buckle the night of Oct. 10, 2014, or early the next morning at his home in Arriba. When investigators checked the home, they found nothing out of place – Ostrander’s bed was made, and it didn’t appear any of his belongings were missing.

At the time, it was thought that Ostrander, who did not have access to a vehicle, may have wandered away from home. But he was also known to carry significant amounts of cash, leading Nestor and investigators to wonder if his disappearance involved foul play.

In the days after he vanished, Nestor brought in search planes and bloodhounds but turned up no sign of Ostrander.

Then came Monday’s discovery about two miles outside Arriba.