Southeast Fort Collins has historically lacked a connection to the rest of the City’s trail system. The Siphon Pedestrian Overpass changed that. Opening in December 2025, it connects the City’s new Mail Creek Trail to the existing Power Trail.
The Siphon Pedestrian Overpass now serves as a pedestrian and bicycle bridge over the Union Pacific Railroad tracks between Harmony Road and Trilby Road. The overpass was constructed in response to significant demand from nearby neighborhoods, schools and businesses; the new bridge creates a safe connection near the middle of what’s currently a two-mile-long gap of connectivity between Harmony and Trilby. The new Mail Creek Trail, opened in 2024, now connects the intersection of Zephyr and Tilden to the Siphon Pedestrian Overpass – passing behind Bacon Elementary and the City’s new Tailwinds Park and beneath Timberline Road to create a safe future connection to the Power Trail. The Power Trail is one of the City’s most important north-south trails, connecting to the Spring Creek Trail on the north end (near Prospect and Timberline) and to the City of Loveland’s trail system on the south end (near Carpenter and Lemay).
Construction on the Siphon Pedestrian Overpass began in February 2025 and will be completed in December 2025.
We thank everyone in communities near the overpass for their patience and collaboration with us during the construction process.
This project cost $4 million to complete, leveraging funding from these sources: