What's open, what's closed, and what's being worked on right now.
Last checked May 28, 2026
Bridge reconstruction project on Boston Avenue. The replacement affects access to the St. Vrain Greenway underpass connecting downtown to the trail network.
Latest change · The city updated this page. Added: "Scheduled Maintenance for Employment Opportunities, Vendor and Employee Self-Service portals"
USACE flood mitigation project closing the St. Vrain Greenway between Izaak Walton Park and Ken Pratt Blvd. The greenway underpass and adjacent path segments are closed to all users through construction completion.
Latest change · The city updated this page. Added: "Scheduled Maintenance for Employment Opportunities, Vendor and Employee Self-Service portals"
Overview of all active RSVP construction zones and detour areas across the St. Vrain corridor.
Latest change · The city updated this page. Added: "Scheduled Maintenance for Employment Opportunities, Vendor and Employee Self-Service portals"
Multi-phase flood recovery project rebuilding the St. Vrain Greenway through central Longmont. Involves channel widening, bank stabilization, and trail reconstruction across multiple reaches.
Latest change · The city updated this page. Added: "Scheduled Maintenance for Employment Opportunities, Vendor and Employee Self-Service portals"
Greenway reconstruction project along Rough and Ready Ditch. Involves trail surface improvements and drainage work.
Latest change · The city updated this page. Added: "Scheduled Maintenance for Employment Opportunities, Vendor and Employee Self-Service portals"
New 2-mile eastern trail extension under construction, connecting the existing St. Vrain Greenway toward the eastern edge of Longmont.
Latest change · The city updated this page. Added: "Scheduled Maintenance for Employment Opportunities, Vendor and Employee Self-Service portals"
LATE checks these sources on a regular schedule and flags changes that are likely to affect trail access. Some checks are automated; others are verified manually before an issue goes out.