CSI Zone Boundaries
Zone 1:
Bounded on the west by the Continental
Divide, north by the Colorado - Wyoming - Nebraska state line, east
by Colorado - Nebraska state line, and south by an east/west line
passing just north of Boulder.
Zone 2:
Bounded on the west by the Continental
Divide, north by an east/west line passing just north of Boulder,
east by the Colorado - Kansas state line, and south by an east/west
line passing just north of Castle Rock.
Zone 3:
Bounded on the west by the Continental Divide (includes Monte
Vista and Alamosa) north by an east/west line passing just south of
the Fort Carson (includes Canon CIty and Salida) east by the
Colorado - Kansas state line, and south by the Colorado - New Mexico
state line.
Zone 4:
Bounded on the east by the
Continental Divide (excludes Monte Vista and Alamosa), north by the
Colorado - Wyoming state line, west by the Colorado - Utah state
line, south by the Colorado - New Mexico state line.
Zone 5:
Bounded on the west by the Continental Divide,
north by an east/west line passing north of Castle Rock, east by the
Colorado - Kansas state line, and south by an east/west line passing
just south of Fort Carson (excludes Canon City and Salida).