Longmont Completes Izaak Walton Reach 2 as Part of the Resilient St. Vrain Project

The City of Longmont completes construction of Izaak Walton Reach 2 as part of the Resilient St. Vrain Project. The completed improvements increase the creek’s capacity to safely carry a 100-year flood while restoring an important connection for people walking, biking and rolling. The project is one part of the City’s long-term work to build a more resilient community following the 2013 flood.

Construction began in spring 2025 and included improvements to the St. Vrain Creek channel and reconstruction of the Greenway Trail between Boston Avenue and Sunset Street.

The project was completed through a partnership between the City of Longmont and the U.S. Army Corps of Engineers. The Public Partnership Agreement was established in 2016 to design and construct this portion of the Resilient St. Vrain Project. Design was completed in 2022, and construction began in March 2025.

The rebuilt Greenway Trail now features a 10-foot-wide concrete path with 3-foot gravel shoulders, restoring a key segment of Longmont’s regional trail network and making it easier for residents and visitors to safely walk, bike and roll through the corridor.

In addition to improving flood protection and trail access, the project includes environmental improvements along the creek. Native vegetation will be planted throughout the project area during the cooler temperatures of fall. To control erosion on the soil banks in the meantime, a seed mixture was sprayed along the project corridor. This seed mixture does not require irrigation and will not impede the future permanent vegetation. Residents may notice short-term trail closures during final restoration work this fall.

Learn more about the Izaak Walton Reach 2 Project on the City’s project webpage.