State Highway 125 (SH 125) is a state highway in the U.S. state of Colorado. The highway runs north–south through Jackson and Grand counties in north central Colorado. It furnishes the principal north–south link through North Park and a connection to Middle Park over Willow Creek Pass. It is two-lane along its entire route. SH 125's southern terminus is at U.S. Route 40 (US 40) west of Granby, and the northern terminus is at Wyoming Highway 230 (WYO 230) at the Wyoming border.

Quick Facts State Highway 125, Route information ...

State Highway 125
Map of northern Colorado with SH 125 highlighted in red
Route information
Maintained by CDOT
Length	75.41 mi[1] (121.36 km)
Major junctions
South end	US 40 west of Granby
Major intersections	SH 14 near and in Walden SH 127 north of Cowdrey
North end	WYO 230 at the Wyoming border
Location
Country	United States
State	Colorado
Counties	Grand, Jackson
Highway system
Colorado State Highway System Interstate US State Scenic
← SH 121 → SH 127

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At the northern end, the highway begins at the Wyoming state line, where it is contiguous with Wyoming Highway 230. It follows the North Platte River and Michigan River southward through Cowdrey and Walden, the county seat of Jackson County and the largest community along the road. At Walden it intersects State Highway 14. South of Walden, it crosses the southern end of North Park along the valley of the Illinois River, a tributary of the Michigan. It passes the unincorporated community of Rand, then ascends into the mountains and crosses the continental divide at Willow Creek Pass (elevation 9621 ft), one of the lowest crossings of the continental divide in Colorado. On the south side of the pass it descends the sparsely populated valley of Willow Creek into Middle Park. It terminates at its southern end at U.S. Highway 40 two miles (3.2 km) west of Granby.

• List of state highways in Colorado