Castletown 09 refers to a section of the River Liffey accessed through the grounds of Castletown House in Celbridge, County Kildare. The primary access point for paddlers is via the Barnhall Rugby Club access road. From there, it is a walk across fields to reach the river bank. This section is approximately a five-minute paddle from a referenced point, indicating it is part of a larger route, such as the International Liffey Descent. The paddling experience is defined by its connection to this historic long-distance race, suggesting moving water suitable for touring and racing kayaks or canoes. The proximity to Castletown House, a significant 18th-century Palladian mansion, provides notable historical and aesthetic interest along the banks. The area is used for organized paddling events, implying that general access may be managed, and paddlers should be aware of any event schedules or permissions required, particularly when accessing via private or semi-private land like the rugby club grounds and estate fields.