Big Rock Nature Preserve offers a diverse and captivating natural landscape, inviting visitors to explore its mature woodlands, pristine marshes, expansive tall-grass prairies, and clear-running creeks. At the heart of this remarkable preserve lies Siegler Lake, a stunning 65-foot deep body of water that adds to the area’s allure. No matter the season, Big Rock Forest Preserve provides an enriching experience, from summer fishing and autumn hikes through vibrant foliage to winter cross-country skiing and the delightful birdwatching opportunities of spring migration.
Exploring the Natural Wonders of Big Rock
Big Rock Nature Preserve is a haven for outdoor enthusiasts and nature lovers alike. Siegler Lake, a prominent feature within the preserve, is a popular destination for fishing. For those planning to cast a line, please note the specific fishing harvest limits in place to maintain the lake’s healthy ecosystem:
- Bluegill: Daily harvest limit of 10 fish.
- Channel Catfish: Daily harvest limit of 3 fish.
- Common Carp: No harvest limit.
- Crappie (white or black): Daily harvest limit of 10 fish.
- Largemouth Bass: Protected slot limit between 14-18 inches. Harvest limit of one fish greater than or equal to 18 inches and three fish less than 14 inches.
- Northern Pike: Daily harvest limit of one fish, with a 24-inch minimum length.
- Smallmouth Bass: Catch and release only, ensuring the conservation of this species.
Beyond the lake, Big Rock Creek stands out as a stream of exceptional quality within Illinois. Designated as one of the state’s best, it supports a thriving population of freshwater mussels, which serve as key indicators of a healthy and high-quality aquatic habitat.
The landscape of Big Rock Nature Preserve is further characterized by high sandy bluffs that offer picturesque views of the interwoven woodlands and prairies. Adding to the ecological diversity is a unique wetland known as a fen, sustained by natural underground seeps in the southeastern part of the preserve. This specialized environment adds another layer of interest for those keen on ecological exploration.
Visitors can easily navigate and immerse themselves in the preserve’s beauty. Trails accessible from both parking areas lead to the diverse habitats – woodlands, marsh, fen, and prairie. For a more structured walk, a loop trail encircles Siegler Lake, presenting captivating water views at every turn. It’s important to remember that swimming is strictly prohibited within Big Rock Nature Preserve. Violations may result in fines up to $200, ensuring the safety and preservation of the natural environment for all visitors. For those seeking a longer trail experience, a 1.25-mile screenings trail, established in 2013, extends northward from the lake towards Big Rock Campground, offering a path for further exploration.
Equestrian enthusiasts are also welcomed at Big Rock Nature Preserve, with designated horseback riding trails available. The majority of these trails feature natural surfaces with mowed grass paths, blending seamlessly with the natural setting. In certain areas of the preserve, multi-use limestone screenings trails and asphalt bike trails are also accessible, shared with runners, bicyclists, and dog walkers. Horse riders are kindly asked to remain on marked, forest preserve-maintained trails to protect the natural areas. Please note that trail riding is not permitted in restricted natural zones, Illinois Nature Preserves, picnic sites, or agricultural areas. To prevent damage during wet conditions, trails may be temporarily closed; signage at preserve entrances will indicate any closures. Currently, trails at Big Rock Nature Preserve are OPEN for equestrian use.
Amenities and Activities
Big Rock Nature Preserve is equipped with amenities to enhance visitor experience and enjoyment of the outdoors:
- Fishing: Siegler Lake provides excellent fishing opportunities (subject to regulations).
- Horseback Riding: Designated trails cater to equestrian activities.
- Picnic Areas: Ideal spots for enjoying meals amidst nature.
- Shelters: Provide cover and休憩 areas within the preserve.
A Glimpse into the History of the Preserve
The story of Big Rock Nature Preserve began in 1992 with an initial 294 acres dedicated to conservation. Expansion continued in 1998 with the addition of 133 acres, which notably included a former gravel quarry site. Further growth occurred in 2003 (30 acres), 2006 (118 acres), and 2008 (19 acres), steadily increasing the protected land. The final significant addition came in 2010, with 246 acres acquired, partly through funding from an Illinois Department of Natural Resources (IDNR) Open Space Land Acquisition & Development (OSLAD) grant, bringing the preserve to its current expansive size.
Siegler Lake, now a central attraction, has an interesting origin. It was once a limestone quarry, but nature dramatically transformed it in 1996. During that year, severe floodwaters breached the banks of Big Rock and Welch Creeks, sending torrents of water into the quarry. This flood event unexpectedly created a 32-acre lake, which surprisingly became populated with fish and invertebrates swept in by the floodwaters. Efforts to enhance fish habitat have since been undertaken, and Siegler Lake now supports a diverse range of fish and aquatic wildlife, making it a favored destination for anglers and a testament to nature’s resilience and transformative power.
