July Sinton Trail Construction Updates – repaving and I25 project

Sinton Trail Closed for repaving between Chestnut St and Holland Park starting August 19th

Sinton Trail Repaving – Delayed Starting Aug 19 – October 2025
Sinton Trail I25 underpass – Final girder placement single day overnight
7 pm Tuesday, Sept 2 – 7am Wednesday Sept 3
Sinton Trail I25 underpass – (Complete) July 7 – 10

Updated 8-19-2025 – We wanted to make a single post highlighting the two projects impacting The Sinton Trail through July. A major repaving project starts August 2025 and the short closure at the I-25 underpass (July 7–10) will allow for final wall construction. Learn about detours, timelines, and long-term improvements—plus future projects like the Centennial Underpass reconstruction.

Keep scrolling to read more info on these projects, click below to view our interactive detour and closure map.

🛠 Sinton Trail Repaving
(August – Fall 2025)

Project Start delayed until August 2025. The Sinton Trail between Chestnut St. and Holland Park will close for approximately three months starting in August. This current project is funded by voter approved PPRTA 2 funds, City Sinton Trail project website linked here.

Improvements Coming:

• New Surface: Upgrading from asphalt to more durable concrete
• Fixes: Eliminating the problematic dip and uneven pavement near Chestnut (goodbye to that awkward dip under the pipe!)
• Alignment: Smoother curves and better sight lines
• Drainage: drainage and grade improvements along the whole trail
• Chestnut Underpass Access Paving: Concrete for the access to the underpass under Chestnut where gravel is now

Future Phases:

Holland Park to Centennial – Trail will be addressed during a planned stormwater, timeline depends on FEMA funding.
Centennial to GoG Road – be dependent on funding availability, but likely PPRTA 3 dollars, since other corridors are being addressed.

We’ll share timelines when available.

Future Future Project: The Centennial Underpass reconstruction approved by voters as part of PPRTA 3 is still in planning stages – more details coming.

Project Start delayed until August pending required permits. The Sinton Trail between Chestnut St. and Holland Park will close for approximately three months starting August 19th.

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Sinton Trail under I25 Closure: Single Night September 2-3

Key Details:

• Expected Closure Period: 7 pm Tuesday, Sept 2 – 7am Wednesday Sept 3
• Reason: Safety during girder installation for the I-25 Acceleration/Deceleration Lanes Project
• Detour Required: Follow posted signs for alternate routes

Trail has reopened as of July 11th please stay tuned for future closures to place girders once retaining walls have been completed (scheduled for night of September 2-3). To keep you updated on the work impacting The Sinton Trail under I25. The closure that occurred in June will continue through mid July. The trail reopened Thursday July 3rd, will close Monday July 7th reopening Thursday July 10th. This, most recent closure, is for wall construction of I-25 crossing Ellston Street and the Sinton Trail Connection.

Complete – Sinton Trail under I25 Closure: June – July 2025

Trail has reopened as of July 11th please stay tuned for future closures to place girders once retaining walls have been completed (scheduled for night of September 2-3). To keep you updated on the work impacting The Sinton Trail under I25. The closure that occurred in June will continue through mid July. The trail reopened Thursday July 3rd, will close Monday July 7th reopening Thursday July 10th. This, most recent closure, is for wall construction of I-25 crossing Ellston Street and the Sinton Trail Connection.

Key Details:

• Expected Closure Period: June 20 – June 24, June 25 – July 3, July 7 – July 10
• Reason: Safety during bridge demolition and wall construction for the I-25 Acceleration/Deceleration Lanes Project
• Detour Required: Follow posted signs for alternate routes

Detour options for bicyclists and pedestrians

• South on Chestnut Street, crossing I-25 at Centennial Boulevard to reconnect with Pikes Peak Greenway Trail.
• North on Chestnut Street to Garden of the Gods Road, reconnecting with Pikes Peak Greenway Trail east of Pikeview Reservoir.
• Garden of the Gods Road to south on Chestnut Street.
• Filmore to Chestnut Street

🚴 Rider Tips for Summer Closures

1. Check COS Parks social media (Instagram/Facebook) for last-minute updates
2. Try alternate routes – early to find your best option (interactive closure/detour map)
3. Allow extra time – especially for commutes during closure periods

We’ll update this post as we receive more details from the city. While these closures are inconvenient, they’ll result in much better trail infrastructure for years to come!

Have questions or tips to share? Comment below or tag us on social media with your favorite detour routes.