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Closures & Alerts

Improvement Projects

We are working on projects and plans that will help create new trails and improve public access and natural resource restoration at preserves throughout Lake County. Check closure and construction status »

Buffalo Creek | Long Grove

Wilke Road Trail Extension

The Illinois Department of Transportation and the Village of Arlington Heights are collaborating to provide additional public access to the preserve. The project includes construction of a pedestrian crosswalk from Wilke Road to the north side of Lake Cook Road. A crushed stone connector trail will be built from the new crosswalk to the existing trail loop inside the preserve.

During the course of the project, trails will be open for public use. Please use caution, slow down and look for signs and work crews along the way. Anticipated completion is summer 2021.

Questions, comments, updates? Contact the Village of Arlington Heights, 847-368-5261.

Reservoir Expansion and Preserve Improvements

We are collaborating with the Metropolitan Reclamation District of Greater Chicago and the Village of Buffalo Grove to reduce flooding and provide additional public access improvements at the preserve. The reservoir has been expanded and new trails, overlooks and boardwalks opened to the public this summer. Maintenance and monitoring of the newly planted areas will continue through 2025.

There will be additional work this fall to improve the flow of water of Buffalo Creek into the preserve, make minor repairs to the parking lot and upgrade the banks of the energy dissipation pool along Arlington Heights Road. During the parking lot repairs, the lot will be closed for three days. The preserve will still be open to the public but only accessible by the preserve’s pedestrian entrances. Please use caution, slow down and look for signs and work crews along the way. Anticipated completion is fall 2020.

Questions, comments, updates? Contact MWRD, 312-751-3247.

Ethel's Woods | Antioch

A 0.7-mile section of the Millennium Trial runs along the western edge of the preserve. Other public access improvements to the 500-acre preserve include toilets, a 0.8-mile gravel loop trail and four scenic overlooks. Future plans include a pedestrian tunnel under Route 45 to safely connect Ethel's Woods to Raven Glen Forest Preserve via the Millennium Trail.

Although preserve improvements are complete, restoration activities will continue for a few more years while we finalize our efforts to return the area to a natural landscape.

Major multiyear land restoration efforts that have been completed include restructuring an earthen dam to slowly drain a man-made lake as well as ecological restoration of the historic North Mill Creek stream channel. Funding assistance for this restoration work was provided by a $1 million Clean Water Act grant from the Illinois Environmental Protection Agency.

Questions, comments, updates? Contact Project Manager David Cassin, 847-968-3427. 

Fort Sheridan | Lake Forest

Great Lake Fishery and Ecosystem Restoration Program

The U.S. Army Corps of Engineers (ACOE), working through the Great Lakes Fishery and Ecosystem Restoration (GLFER) program, has collaborated with the Lake County Forest Preserves, Lake Forest Open Lands Association and Openlands on a large-scale coastal ecosystem restoration project at Fort Sheridan Forest Preserve in Lake Forest, Illinois. This project has been ongoing since 2011 and work was implemented in two phases. Both phases are now complete.

Phase I Completed

In Phase I, extensive construction and restoration work was conducted to restore natural features, landscapes and species in the uplands, ravines and along the Lake Michigan lakeshore. The project extended from Lake Forest Open Lands Association property to the north and through Openlands property on the southern end. 

Phase II Completed

In Phase II, we partnered with the ACOE to restore nearshore habitat for aquatic species found in Lake Michigan by installing underwater living reefs along 1.5 miles of lakeshore. This work was completed in July and August 2020. The reefs were built from tree trunks and branches, root wads, limestone slabs, glacial erratic boulders, cobble and sand. These structures act as human-made reefs to provide submerged habitat for fish and wildlife. They also help stabilize the nearshore lakebed and coastline. Cranes and other heavy equipment were used to install these materials from barges stationed off the lakeshore.

Ongoing Through 2025

Now that work for Phase I and II is complete, ACOE and its contractor will conduct ongoing maintenance and adaptive management in these areas until 2025. This work includes monitoring and management of the reef structures and remediation if necessary.

Check our Interactive Trail Map for up-to-date information about the status of the lakeshore.

Questions, comments, updates? Contact Jim Anderson, Director of Natural Resources, at 847-489-6180. You may also contact Vanessa Villarreal, U.S. Army Corps of Engineers Public Affairs Officer, at 312-846-5330.

Lakewood | Wauconda

Lakewood Master Plan in Progress

In January 2020, our Board of Commissioners approved a master plan for Lakewood Forest Preserve in Wauconda. Engineering work was completed in 2021. Due to a suspension of state grant funding programs and increased volatility in the construction industry, phase one of construction of master plan improvements has been delayed. We anticipate construction to begin in 2022. Want Progress Updates? Email

View Project Documents
Approved Master Plan »  Executive Summary »
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Project Background

In 2018, we initiated the master planning process to evaluate existing conditions and uses of Lakewood. The plan identified potential recreation, education and conservation improvements for the preserve. Learn more »

Project Area
Acquired in 1968, Lakewood has 2,835 acres and is the largest forest preserve in Lake County. It contains a diverse mix of land uses, facilities and natural resources. When combined with adjacent 1,039-acre Ray Lake Forest Preserve, contiguous holdings in this area total 3,874 acres or over six square miles. Lakewood is located east of Wauconda and lies within parts of Wauconda and Fremont Townships. The preserve is intersected by Illinois Route 176, Ivanhoe Road and Fairfield Road.

Project Goals and Objectives 
The new master plan for Lakewood supports the methods and systems needed to reach our 100-Year Vision and Strategic Plan by providing leadership and sound conservation practices, and by promoting an active, healthy lifestyle for people of all abilities to enjoy.

  • Provide an improved public access and recreation experience that is ADA compliant, properly sized, accommodates future needs, and reduces short-term and long-term operating costs.
  • Provide a new, more efficient design that consolidates uses within a smaller footprint, supports educational programs and community events, and satisfies current and future public access needs.
  • Replace and/or renovate critical operational infrastructure.
  • Dedicate new areas for restoration consistent with natural resource goals.

Questions or Comments? Contact Director of Planning and Land Preservation Randy Seebach at 847-968-3262 or via email:

Oriole Grove | Lake Bluff

Oriole Grove Master Plan Approved

On March 9, 2021, our Board of Commissioners approved a master plan for Oriole Grove Forest Preserve. The approved plan is consistent with the master plan goals. It also reflects feedback received from staff, commissioners, key stakeholders and the public on improved public access and recreation experiences for people of all ages and abilities that are respectful of the sites sensitive natural resources.

Approved Master Plan   Executive Summary

Implementation of Project Goals

Project Background
In 1980, the Lake County Forest Preserves acquired Oriole Grove jointly with the Illinois Department of Transportation as a potential flood water storage facility. The site was later declared unfeasible for flood storage purposes and remained in joint ownership until September 2019 when the Lake County Forest Preserves assumed full ownership. At 86 acres, Oriole Grove is a keystone preserve within a much larger tract of 282 acres of open space and natural areas along the Skokie River corridor. Lake Bluff Open Lands Association manages 35 acres to the immediate north and Lake Forest Open Lands Association manages 119 acres immediately to the south of Oriole Grove. Another 42 acres are dedicated Illinois State Natural Areas on private property. The site is considered a gem by local residents and was given the nickname Jensen Woods, named after Jens Jensen, the prominent landscape architect who designed the property in the early 1900s when it was owned by the Kelley family. 
While much of Oriole Grove is overgrown with invasive plants, volunteers and contractors have restored some portions of the site. The preserve offers 1.3 miles of hiking and cross-country skiing trails with multiple surfaces ranging from deteriorated asphalt to natural surface trails. 
Goals of the Plan 

  • Provide an improved public access and recreation experience that is ADA compliant and reduces short- and long-term operating costs.
  • Create ways for the public to view and enjoy the cultural landscape feature along Jensen Pond.
  • Continue restoration efforts and dedicate new areas for improving the natural landscape that are consistent with our 100-year vision and landscape-scale conservation goals. 
  • Restore much of the original hydrology, create high-quality sedge meadow, control invasive species, and install aquatic, wetland and savanna plants. 

Currently the Oriole Grove Master Plan improvements are not funded but will serve as a starting point for discussion should funding opportunities arise through private donations and grants. "When we gained full ownership of Oriole Grove in September 2019, there were indicators that there may be local interest in moving the project forward through donations, along with a dedicated endowment for ongoing maintenance," said Executive Director Alex Ty Kovach. "We have more than $40 million in unfunded projects, several of those have been on the list for many years. There are no development dollars available at this time and the only way we can move an unfunded improvement project forward is through grants and donations."

As its charitable partner, the Preservation Foundation of the Lake County Forest Preserves is positioned to raise private dollars for the project if there is an interest in accelerating the funding timeline rather than waiting for traditional development dollars to be budgeted. 

Questions or Comments? Contact Director of Planning and Land Preservation, Randy Seebach, at 847-968-3262, or via email at

Millennium Trail and Greenway––Route 45 Underpass | Antioch

The new Millennium Trail–Route 45 underpass will provide safe passage between Ethel's Woods and Raven Glen forest preserves for pedestrians, bicyclists and equestrians, as well as a future connection to the Millennium Trail. The project includes a 145-foot, poured-in-place concrete trail tunnel and 0.8 miles of new paved and gravel trails to join the two preserves. Expected project completion is fall 2021. 

View Project Map

The underpass is a crucial part of the planned extension of the Millennium Trail and Greenway, a 41-mile regional trail connecting central, western and northern portions of Lake County to the Des Plaines River Trail. Today, nearly 33 miles of the Millennium Trail are open to hikers, bicyclists and cross-country skiers. The trail currently connects 10 preserves and 10 municipalities. When complete, it will link 13 schools, 12 municipalities, 18 parks, and 12 forest preserves. View completed sections of the Millennium Trail on our Interactive Trail Map

Project Funding

The Millennium Trail–Route 45 underpass project is partially funded by a federal Transportation Alternatives Program (TAP) grant administered through the Illinois Department of Transportation. The TAP grant covers 80% of total construction costs. During construction, Route 45 will remain open, although occasional traffic delays can be expected. 

Questions, comments, updates? Contact Project Manager David Bugaj, P.E, Civiltech Engineering, 630-878-7635.