The La Plata County Sheriff's Office says about 300 people searched an area between Durango and Vallecito on Saturday for clues in the disappearance of Dylan Redwine.
Investigators say that of dozens of items flagged by searchers, 10 were collected for future reference in the case.
Dylan was reported missing Nov. 19 and was last seen wearing a black T-shirt and a "Duke Blue Devils" baseball cap. The boy's father, Mark Redwine, says he left his son at his Vallecito-area home while he ran errands.
Dylan lives with his mother in Colorado Springs but was visiting his dad for Thanksgiving as part of a court order. Authorities don't believe the boy ran away.
(Copyright 2012 by The Associated Press. All Rights Reserved.)