More than 20 searchers spent six hours Sunday looking for a man who was thrown from his raft on the Poudre River the day before but they failed to find him.

The missing rafter has been identified as David L. Smith, 57, of Fort Collins, according to a Sunday evening news release from the Larimer County Sheriff's Office.

Members of Larimer County Sheriff’s Office Emergency Services, Larimer County Search and Rescue and Larimer County Dive Rescue Team searched 12 miles of the river from mile marker 107 (west of Mishawaka) to mile marker 119. Crews did not enter the swift-moving river because they did not have information to search in a specific area. A drone team searched the area as well.

The Poudre was flowing around 1,800 cubic feet per second and was around 50 degrees Sunday.

Sunday's search ended at 3 p.m. There are no further large-scale searches planned unless new information becomes available about the man’s location. The sheriff's office will monitor the river conditions to determine when to conduct future searches and will continue to keep Smith's family updated with new information.

Smith was last seen wearing blue jeans. He was not wearing a shirt and was not wearing a safety jacket.

The man, along with a 46-year-old man and his 13-year-old son, were rafting Saturday afternoon when their single-chamber inflatable raft came out from under them, the sheriff's office reported.

Those two made it to the riverbank but were separated from Smith. They suffered minor injuries and were released at the scene after being checked out by medical personnel. The 13-year-old was the only one wearing a life jacket.

Emergency responders got the call about 2:20 p.m., and the search was paused for the evening at 7:40 p.m.

Brad Modesitt, owner of Mountain Whitewater, a Fort Collins-based commercial rafting company, posted on Facebook that two of his guides helped with the rescue.

At least five people have died on Colorado's river this season, prompting law enforcement agencies to urge river recreationists to use caution, as many rivers are running high and fast due to abundant snowfall and rain. There have been no fatalities on the Poudre.

Miles Blumhardt looks for stories that impact your life — be it news, outdoors, sports, you name it he wants to report it. Have a story idea, send it his way. Email him at milesblumhardt@coloradoan.com or find him on Twitter at @MilesBlumhardt. If you find value in these stories, support Miles and the other journalists at the Coloradoan by subscribing atColoradoan.com/subscribe