Chubb, Flint Quarry and Castlewood Loop

While the overall komoot tour is rated as 'easy', this loop combines sections of varying difficulty. The Chubb Trail is considered the most challenging mountain biking trail in the St. Louis area, rated 'Black Diamond' with a 'Hard' physical rating. The Flint Quarry Trail is generally beginner to intermediate, and the Castlewood Loop is described as 'Beginner' difficulty, though it can be rough in certain conditions.

Yes, the Chubb Trail features steep climbs and descents, loose rocks, technical sections, and tight switchbacks. A notable challenge is "the Steps," an exposed section of Kimmswick Limestone requiring significant technical skill. The first four miles from the Tyson Trailhead are particularly demanding.

The loop offers diverse terrain. You'll encounter dirt and gravel sections, notably rocky and potentially slippery areas on the Chubb Trail. The Castlewood Loop can have long runs of deep sand in the river bottoms, requiring wider tires. Expect a mix of forested singletrack and sections along the Meramec River.

Riders are often rewarded with great views after tough climbs on the Chubb Trail, which passes through beautiful forested areas. The Flint Quarry Trail includes a viewpoint with a bench, perfect for enjoying the scenery. The overall loop provides a natural setting along the Meramec River.

Yes, the Flint Quarry Trail is particularly interesting as it weaves in and out of ancient Native American flint pit mines. High-quality flint was once extracted from these sites to produce arrowheads.

Parking is available at West Tyson County Park, which serves as a common trailhead for the Chubb Trail. Other access points include Lone Elk County Park and Castlewood State Park, depending on which section of the loop you plan to start from.

Generally, there are no specific permits required for mountain biking on these trails within West Tyson County Park, Lone Elk County Park, or Castlewood State Park. However, it's always a good idea to check the official websites for these parks for any updated regulations or entrance fees, especially for Castlewood State Park.

Spring and fall generally offer the most pleasant conditions with milder temperatures and beautiful foliage. However, the trail can be ridden year-round. Be aware of specific seasonal challenges: the Castlewood Loop is often more enjoyable when the ground is frozen or after an extended dry spell due to sandy sections.

Dogs are generally allowed on these trails, but they must be kept on a leash at all times. Please remember to clean up after your pet to help maintain the trail's natural beauty and cleanliness for all users.

While the Chubb Trail and Flint Quarry Trail are durable when wet, they can become very treacherous due to slippery rocks. The Lone Elk connector part of the Chubb Trail is particularly prone to standing water and flooding after rain, so it's best to avoid it in wet conditions. In winter, frozen ground can make some sections of the Castlewood Loop more rideable, but watch out for ice.

Restrooms are typically available at the main trailheads within West Tyson County Park, Lone Elk County Park, and Castlewood State Park. For cafes or pubs, you'll need to venture a short distance into nearby towns like Eureka, MO, which offer various dining options.