Izaak Walton Reach 2
Project Overview
Project Status
This project started construction in March 2025 and is scheduled to be completed in August 2026
- On June 16 the Greenway Trail between Boston Ave and Sunset St will be closed and remain closed until the project is complete.
- Download a copy of the trail detour map.
- Access to Izaak Walton Park, Clubhouse, and pond will be available, but temporary closures will be required.
Construction of the St. Vrain channel and Greenway Trail will be completed in August 2026. The trail will be reopened to bicycles and pedestrians. Landscaping within the construction area will be delayed until fall 2026 to avoid planting during undesirably hot weather. The Greenway Trail will likely be closed for a short time to enable revegetation efforts.
Goals & Planned Improvements
The Izaak Walton Reach 2 project will increase the channel capacity to safely contain 100-year flood water levels. Once work is completed in this reach, the floodplain to the north of the St. Vrain Creek will be mitigated, protecting lower downtown from future flood risk. The Greenway Trail will be reestablished as be a 10-ft wide concrete path with a 3-ft wide gravel shoulder.

This illustration shows the future Izaak Walton Pond and St. Vrain Creek overlaid on top of the same area before construction began.
Project Schedule
Construction started in March 2025. The project is expected to take 18 months and is scheduled to be completed in August 2026.
Frequently Asked Questions
There are a variety of reasons that a project can be delayed. The primary cause in this case was the negotiation for acquiring the necessary land to construct the project. Once that was resolved, the project was advertised for construction and continued to move forward.
The park and clubhouse will be open most of the time. Notice about expected closures will be posted in the Project Status of this webpage. For the latest information about reserving the clubhouse please visit the Izaak Walton Clubhouse webpage. If you do reserve the clubhouse, please keep in mind that active construction will still be happening. Increased noise and trail access should be considered.
The greenway trail will be closed from June 16, 2025 until the construction is scheduled to be complete in August 2026.
The City does what we can to protect as many trees as possible. In this case, trees were removed during construction to widen the creek channel. Towards the end of the project, a variety of native vegetation will be planted, including approximately 50 trees.
The dirt has been swapped and the sledding hill rebuilt. Fencing will remain around the hill until revegetation efforts begin in Fall 2026. We expect the sledding hill and disc golf tee box to reopen before winter 2026.
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