Based on the available information, the Allen Road 204 boat ramp in Fenton, Missouri is a public boat ramp that is open year-round. It provides access to the Meramec River, which is a popular destination for recreational boating, fishing, and other water activities.

The boat ramp is reportedly located on a quiet section of the river, which makes it an ideal spot for launching canoes, kayaks, and other smaller watercraft. However, larger boats may also be able to use the ramp, as it is reportedly wide enough to accommodate a variety of vessel sizes.

According to recent reports, the Allen Road 204 boat ramp is in good condition and well-maintained. Visitors can expect to find parking facilities, restrooms, and other amenities nearby, making it a convenient and accessible location for launching and retrieving boats.

Overall, the Allen Road 204 boat ramp appears to be a popular and well-regarded facility for boaters in the Fenton area. Its location on the Meramec River and its ample size make it a great choice for anyone looking to enjoy a day on the water in Missouri.