Oak Ridge and Deer Run Trail Loop

Parking for this loop is available within Onondaga Cave State Park. You'll find designated parking areas near the visitor center or trailheads within the park.

Yes, dogs are generally permitted on trails within Onondaga Cave State Park, including this loop. However, they must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all hikers.

Spring and fall are often considered the best times to hike this trail. In spring, you'll experience lush greenery and blooming wildflowers, while fall offers vibrant foliage. Summer can be hot and humid, and winter may present slippery conditions due to ice or mud, especially on steeper sections and stream crossings.

While there is typically no general entrance fee to access the hiking trails in Onondaga Cave State Park, there are fees for cave tours. Always check the official Missouri State Parks website for the most current information on fees and regulations before your visit.

The terrain is varied and can be challenging in sections. Expect natural surfaces with dirt, mud, and gravel. You'll encounter hilly sections with steps, bluffs over 100 feet high along the Meramec River, roots, downed vegetation, and potential shifting rock. There are also stream crossings without bridges and steep grades over 10%.

The trail passes through dolomite woodland and a south-facing glade undergoing restoration. You can expect to see various native trees like oak and maple, and potentially mountain laurel and rhododendron thickets. Wildlife sightings might include deer, various bird species, and other small woodland creatures.

Yes, the route incorporates sections of several trails within Onondaga Cave State Park. It primarily follows the Oak Ridge Trail and the Deer Run Trail, and also utilizes the White Connector 1, Amphitheater Trail, and Blue Heron Trail to complete the loop.

Given its moderate difficulty, hilly terrain, steep grades, and natural surfaces with potential for mud and shifting rock, this loop might be challenging for absolute beginners. Hikers should have a reasonable level of fitness and be prepared for uneven footing and some strenuous sections.

A significant highlight is the section along the Meramec River with bluffs over 100 feet high. You'll also pass a concrete building marking the man-made entrance to Cathedral Cave, and experience the unique dolomite woodland and glade environments within Onondaga Cave State Park.

Given the varied terrain and potential for stream crossings, sturdy hiking boots are highly recommended. Bring plenty of water, especially during warmer months, as there are no guaranteed water sources on the trail. A map or GPS device, snacks, and appropriate layers for changing weather conditions are also advisable.

On average, hikers can expect to complete this 11.6 km (7.2 miles) loop in approximately 3 hours and 10 minutes. However, this can vary depending on your pace, the number of stops you make, and trail conditions.