Police say they resulted from nuisance complaints.
Officers with the Frederick Police Directed Patrol Unit made some arrests Friday along the Carroll Creek Linear Park.
Authorities say Dallas Boone, 19, was given citations for two separate littering offenses. After the second time, he was taken to central booking.
Nicholas Combs, 24, and John Stevens, 43, were also cited by officers for littering.
Police gave Michael Humphreys, 51, a citation for drinking alcohol in the park.
Boone, Stevens and Humphreys are Frederick residents; Combs has no fixed address.
Police say these arrests resulted from surveillance along the Carroll Creek Linear Park that came about due to nuisance complaints.