Mending Fences by Nya Rawlyns

Matt returns home to Crow Creek to settle a score with his dad and lay to rest demons that have haunted him for years. He's made some spectacular mistakes that cost him dearly: his career in the military and the trust of his brothers-in-arms. He's willing to spend a lifetime to atone but his past dogs him at every turn.
Ben and Matt's paths cross when they discover Matt's father has gone missing from a cattle drive in the high country of the Absaroka Range. What starts as a simple search and rescue turns into a race against time when rustlers and the forces of nature conspire against them.
Both men discover that the wilderness will test their mettle and their bravery, but the ultimate proving ground lies in overcoming the challenges to their minds and hearts.
Warning: contains adult sexual M/M content, romance, and adult language.
Mending Fences takes place in the fictional area of Crow Creek, Wyoming. There are some recurring characters from earlier books in the series, but it can be enjoyed as a standalone novel.