This is a circular walk that starts in the village of Harlington and takes you up the nearby Sundon Hills and back down again finishing back in Harlington. All hides are fairly straightforward as they are made to be found. The terrain does have some uphill sections when you venture up Sundon Hills but with every uphill, there's a downhill to enjoy. There is a small section which is fairly steep between caches 20 and 21 which will require some caution. There are no styles on the walk, just a few kissing gates along the way. The recommended parking for this walk is in the Harlington Village Hall car park, coordinates can be found as a waypoint on the first cache. Alternatively, parking can be found in the Sundon Hills Country Park car park. Once you've completed this walk the last cache is only a short walk away from the recommended parking, opposite is a village pub if you fancy a drink or bite to eat. We regularly walk this loop and hope you enjoy it as much as we do!