Baseline Road (Colorado)

Baseline Road is a major east-west street in Boulder, Colorado that extends east of the city through parts of four counties.

The total length of Baseline Road is approximately 38 miles (61 km), all of which is within the Denver-Aurora-Boulder Combined Statistical Area in Colorado.

Baseline Road descends from Flagstaff Mountain (site of the 1935 CCC Sunrise Amphitheatre) and runs through the city of Boulder for its first four miles (6 km).

For the next two miles (3 km), from Sheridan Parkway to the interchange with I-25, the road passes through a rural northern portion of the City and County of Broomfield.

Baseline Road passes through the northern part of Brighton for about five miles (8 km), eventually reaching the town of Lochbuie and the interchange with I-76.