Dylan has been missing since Nov. 19. He was last seen by his father, Mark Redwine. Law enforcement believe foul play is behind the boy's disappearance.
Today's search was not prompted by any new leads in the case, said Dan Bender, a spokesman for the sheriff. Investigators want to search the area before a possible snowstorm this weekend.
The sheriff's office has planned for volunteers to comb through ditches on the side of Florida Road, which goes from Durango to Vallecito, where Dylan was last seen. There will be additional search areas if there are enough volunteers.
Investigators have already scoured the area along County Road 501, which is the route from Bayfield to Vallecito, Bender said.
Bender said volunteers can meet at the Edgemont Ranch picnic area at 8:30 a.m. The meeting place is west of Florida Road, or County Road 240 and County Road 234.
As many as 200 concerned community members have already hiked the Vallecito area during organized searches for Dylan. Bender said officials are expecting volunteers from as far away as Denver for Saturday's search.
"Searchers need to be prepared to walk two to four miles over rough terrain, on steep slopes," Bender said.
He said people also need to dress for the weather and bring their own food and water. People should not bring children to the search.
"This is a search for clues related to possible criminal activity," Bender said.
The volunteers will be broken into smaller groups and will be accompanied by a member of the sheriff's office or La Plata County Search and Rescue, he said.
Dylan grew up in Bayfield and moved to Colorado Springs with his mother and brother last summer. He was visiting his father when he vanished.
A tip line has been set up at 970-382-7511 where people can leave messages if they have information on Dylan.