The island was formerly home to a sprawling steel manufacturing facility operated by the Sylvan Steel Company in the early 20th century.
Evidence of the island's industrial past, including building footings and structural iron, remains integrated into the current landscape.
The island is situated within the Mississippi River, separated from the Illinois mainland by the Sylvan Slough.
The bridge connecting the island to Moline was repurposed from an old railroad trestle that once served the island's industrial activities.
Sylvan Island is a 37-acre public park located on an island in the Mississippi River, accessible via a pedestrian bridge from the Moline riverfront. The island features a primitive trail system that winds through diverse riparian woodlands and open fields. Once the site of the Sylvan Steel Mill, the park retains remnants of its industrial history through scattered concrete foundations and rusted metal artifacts. The rugged, unpaved nature of the terrain attracts hikers, mountain bikers, and those seeking an off-the-beaten-path outdoor experience. It serves as a natural habitat for local bird species and river wildlife, functioning as an urban wilderness area within the Quad Cities. The park remains largely undeveloped, providing a stark contrast to the nearby urban infrastructure of downtown Moline.
The pedestrian bridge overlooking the Sylvan Slough and the bridge leading onto the island at sunset.
Wear sturdy, close-toed hiking boots as the trails are unpaved, uneven, and often muddy.
Bring insect repellent, especially during warmer months, as the river environment hosts a high mosquito population.
Check water levels before visiting, as high Mississippi River flows can occasionally submerge low-lying sections of the trail.
Do not attempt to cycle on the trails after heavy rainfall, as the ground becomes prone to significant erosion and deep mud.
The park is subject to closure during periods of high water or flooding, which may occur seasonally.
Practice 'Leave No Trace' principles, as the island is a primitive natural area with no trash receptacles.
