KGRE-FM airs a Regional Mexican music format branded as El Tigre, simulcasting KGRE 1450 AM Greeley, Colorado.
An additional 65-watt booster provides fill-in service to Fort Collins, while KGRE AM has a dependent co-channel translator (K271BN) that extends the FM signal to Greeley proper.
KGRE went on the air in 1998 and, after a two-year stint as a local station for Estes Park known as "102.1 K-Rocky" (KRKI), made several failed attempts to serve the Denver metro area.
The Top 40 format lasted only a few weeks and quickly gave way to Rhythmic CHR under the same name, largely due to new competition from cross-town KFMD 95.7 ("Kiss FM").
Following the purchase of Colorado Springs country outlet KKCS-FM 101.9, 102.1 assumed a simulcast of that station, which remained on the air until nearby KJEB 102.3 (now KVOQ) completed its move into the Denver market and obliterated the more distant 102.1 signal.