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The Whitewater River Run's Main Branch-Forest Boundary in Sec 18, T37N, R15E to Railroad Bridge segment is an excellent destination for whitewater enthusiasts. It stretches for approximately 10.5 miles and is rated Class II-III, making it ideal for intermediate paddlers. The ideal streamflow range for this section is between 200-500 cfs, which usually occurs in the spring and fall. During the summer months, the water levels can drop significantly, making it difficult to navigate the rapids.

The river rapids on this stretch of the Whitewater River Run are exciting and challenging. Some notable rapids include Twisted Sister, Pinball, and Squeeze Play. These rapids are suitable for intermediate paddlers, and caution is advised as some have strong hydraulic features and unexpected drops. There are also several shallow sections and submerged obstacles that require careful navigation.

To ensure safety and enjoyment for all, the Illinois Department of Natural Resources has specific regulations in place for this area. These regulations include wearing a personal flotation device, maintaining a safe distance from other paddlers, and adhering to all signage and markers along the river. Additionally, camping is not permitted on the riverbanks without proper permits.

In conclusion, the Whitewater River Run's Main Branch-Forest Boundary in Sec 18, T37N, R15E to Railroad Bridge segment offers an unforgettable whitewater experience. With its ideal streamflow range, class rating, specific river rapids/obstacles, and regulations, this section is a must-visit for any paddling enthusiast. Get driving directions.