Old Plank Road Trail

The Old Plank Road Trail offers a smooth, paved journey spanning 51.2 miles (82.4 km) with a gentle 528 feet (161 metres) of elevation gain, making it a moderate ride that takes about 3 hours and 13 minutes. You'll glide through diverse landscapes, from the open prairie grasses and wildflowers of the Dewey Helmick and Old Plank Road Prairie Nature Preserves to the charming historic downtown of Frankfort. The flat, straight terrain is perfect for road cyclists looking to cover distance efficiently.

When planning your ride, be mindful of the many street crossings, some of which are on major roads and require extra caution. Frankfort's historic downtown provides an ideal mid-ride stop for refreshments and a break. While no specific parking is detailed, accessing the trail near Frankfort offers convenient amenities and a central starting point.

This trail is a vital link in a larger network, connecting to the Grand Illinois Trail and the American Discovery Trail, as well as other local routes like the Thorn Creek Trail system. Keep an eye out for the distinctive, award-winning suspension bridge over US 45, a notable landmark along the way. The nature preserves also offer opportunities to spot diverse wildlife, including various bird species and beavers.

The Old Plank Road, Cal-Sag & Centennial Trail Loop offers a diverse road cycling experience, combining three distinct paved paths into one substantial journey. You'll glide along the flat, smooth Old Plank Road Trail, pass through the charming downtown of Frankfort, and then transition to the Cal-Sag Trail with its shaded forests and views of Saganashkee Slough. The Centennial Trail follows the Des Plaines River, providing a mix of natural beauty and some industrial stretches, including a challenging rough section near a landscape supply company that demands attention from road cyclists.

This moderate 69.3-mile (111.5 km) loop, with 766 feet (233 metres) of elevation gain, typically takes around 4 hours and 28 minutes to complete. It's best suited for experienced cyclists comfortable with long distances and numerous street crossings, particularly on the Old Plank Road Trail. While the individual sections are mostly flat, the overall length and varied conditions, including a rough industrial road on the Centennial Trail, contribute to its moderate rating. Plan for potential stops in Frankfort for refreshments.

Beyond the cycling, this route is rich in natural and historical context. The Old Plank Road Trail is a former rail-to-trail, and the Centennial Trail is part of the Illinois & Michigan Canal National Heritage Corridor, featuring a historic swing bridge. You'll pass through several forest preserves, offering opportunities for wildlife viewing, including herons, egrets, and even bald eagles. The connectivity of these trails also opens up options for even longer rides by linking to other regional trail systems.