Four Mile Creek Bike/Pedestrian Underpass

The Four Mile Creek Bike/Ped Underpass project will create an important and safe bicycle and pedestrian connection between the City of Boulder's Four Mile Canyon Creek Trail and the OSMP Cottonwood Trails with the construction of approximately 875 feet of new trail that will travel beneath SH 119 and the BNSF railroad tracks.

The project itself consists of two phases.  The first phase will complete the trail connection between the city's Four Mile Creek Trail and the northbound Diagonal highway.  Boulder County hopes to start construction in September.  Construction will include the underpass under SH 119 and a storm drain underneath the BNSF railroad and Boulder Whiterock Ditch.

The second phase will continue the trail connection and run underneath the BNSF railroad to the city's Open Space and Mountain Parks' Cottonwood Trail.  Boulder County is working with the Railroad to get this project approved and scheduled.

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