4.6
(3638)
16,262
hikers
01:02
4.05km
20m
Hiking
The Millennium Trail: Marl Flat offers a delightful and accessible hiking experience, winding through a diverse landscape of wetlands, prairies, and woodlands. You'll find yourself on varied surfaces, from paved paths to crushed stone, as you explore the high-quality wildlife habitat of the Marl Flat Preserve. Look for waterfowl around…
Last updated: June 9, 2026
Waypoints
Start point
Parking
4.05 km
End point
Way Types & Surfaces
Way Types
3.90 km
130 m
< 100 m
Surfaces
3.95 km
< 100 m
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Public parking is conveniently available at the trailhead for the Marl Flat section of the Millennium Trail. You'll find amenities like benches and toilets at this location as well.
No, there are no specific fees or permits required to access the Marl Flat Forest Preserve or to hike this section of the Millennium Trail.
Yes, the trail welcomes hikers with dogs. Please ensure your dog is kept on a leash and that you clean up after them to help maintain the preserve's natural beauty.
The Marl Flat trail offers unique beauty throughout the year. Spring and fall are particularly pleasant for hiking, with vibrant plant life and comfortable temperatures. Winter can also be beautiful for cross-country skiing, and the wetlands attract various waterfowl in warmer months.
The 1-mile section of the Millennium Trail within Marl Flat is paved, offering a smooth and even surface. It's mostly flat with gentle rolling hills, making it an easy and accessible experience for various users.
You'll experience a rich and diverse natural landscape. The preserve is a high-quality wetland environment with an interior pond, woodlands primarily composed of bur oaks, and expansive views from gentle rolling hills. Keep an eye out for various waterfowl like black terns and yellow-headed blackbirds, especially around the wetlands and lake.
Absolutely! With its paved surface, easy physical rating, and mostly flat terrain, this trail is ideal for beginners, families with children, and those looking for an accessible outdoor experience.
The Marl Flat section of the Millennium Trail is about 4 kilometers (2.5 miles) long. Most hikers can complete it in approximately 1 hour, 2 minutes, depending on their pace and how often they stop to enjoy the scenery.
The 1-mile section within Marl Flat is generally experienced as an out-and-back or part of a larger network. While the broader Millennium Trail system offers extensive connections, this specific segment is often used for a straightforward walk through the preserve.
Marl Flat is distinguished by its rare geological feature: "Marl flats." These are unique wetland areas (fens) with flat soils rich in minerals and calcium carbonates from alkaline groundwater, supporting a unique biodiversity. It's also recognized as an "Advance Identification (ADID) wetland complex" due to its high-quality wildlife habitat.
Yes, the Marl Flat Forest Preserve serves as a crucial trailhead for the extensive Millennium Trail system. This regional network spans 33 miles across Lake County, Illinois, connecting various natural areas and residential zones. The route itself is entirely part of the Millennium Trail.
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