1. Start to Railway Gate
The Parish Church of St. Mary the Virgin is the oldest existing building in Horsham. Originally a Norman church occupied the spot and remains of this church are to be found in the tower, the west door and the north-west wall. A new church dedicated to St. Mary the Virgin was completed in about 1247.
Take the path to the right of the church and follow this through the churchyard. Continue straight ahead past the fenced Remembrance Garden to the right containing various streams, lawns and flowerbeds. Ignoring paths to the left and right, go straight on across the narrow steel-framed footbridge over the river Arun.
Turn left and follow the path running alongside the river. As you come to the railway bridge ahead, use the footbridge to cross back over the river, and then turn right to pass under the railway arches. After a few metres, turn right into a wide stone path which runs parallel with and to the left of the railway line. You will reach a wooden kissing gate ahead.
2. Railway Gate to Denne Park
Pass through the wooden kissing gate and you are now entering the grounds of Denne Park. This land is privately owned and the pastures are used for raising cattle so take care with dogs. Follow the wide grass path straight ahead, heading towards a large oak tree with a wooden signpost to its left. As you reach the tree, follow the path as it forks to the left and climbs up Denne Hill.
As you reach the next tree line you will come to a green metal bench on the right which provides a good place for a rest and to enjoy the views back over the town. Continue straight ahead following the fenced woodland on your left. On your right you will pass a large oak tree which has grown over the remains of a circular bench which once sat around its trunk. Follow the path winding along the edge of the woodland. Pass through the remains of a tall metal kissing gate into the woods. Follow the main path meandering through the woodland. As you emerge out of the trees fork left along the narrow grass path for about 80 metres and then turn right to join a raised stone track.
After a few paces, fork right onto the tarmac path heading towards the mansion house – Denne Park House.
Denne Park House is a sandstone property that dates from 1605 but has 18th-century additions. Denne Park had several stone quarries on the estate, and these supplied the Horsham stone roof tiles that are still evident today. Around 1950 the property was divided up into apartments and remains that way today.
About 100 metres before you reach the gate to the mansion, and immediately after a clump of four trees on your left, fork left across the pasture heading for the far corner of the properties
adjoining the mansion. You will come to a wooden kissing gate alongside a metal field gate.
3. Denne Park to River Arun
Pass through the kissing gate to enter the field. Follow the path with the gardens to the private properties directly to your right. Halfway down the field, follow the path as it veers to the left to cut diagonally across to the far left-hand corner of the field. Pass through a wooden kissing gate and follow the path straight ahead into woodland. After a short distance, you will come to a T-junction with Pedlar’s Way, a cycleway running from Horsham to Southwater. Turn sharp left and follow Pedlar’s Way downhill.
Continue ahead through a gap beside a five-bar wooden gate and on your left, you’ll see the beautiful white gleaming trunks of the silver birch plantation. Ignore paths to the left and right and continue for more than half a mile. Eventually, you will come to a private residence on the left with large lakes in the garden. Shortly afterwards you will come to a wide concrete bridge over the river Arun – a good place for dogs to paddle in the summer months.
The River Arun’s source is a series of small streams in the St Leonard’s Forest area to the east of Horsham. The river flows south through Arundel and then meets the English Channel at Littlehampton.
4. River Arun to Chesworth Lane
Cross over the River Arun and after a few paces turn left up a stone track, which swings left and leads you to a refurbished stone barn. Follow the path to the right of the barn and continue passing between a house on the right and a local authority depot on the left. Ahead is a small pond and reed bed, where reed warblers breed every summer.
Bear left here with the depot on your left and the pond on your right. Continue straight ahead along the tarmac track. The pastures to the left and right are managed as a nature reserve by Horsham District Council, and you will notice the traditionally laid hedges on your left. Continue to the end of the track where you’ll come to a vehicle barrier.
5. Chesworth Lane to End
Pass alongside the vehicle barrier, over the bridge which crosses a stream and continue straight ahead into Chesworth Lane, a residential street. Continue to the end of the road, passing under the arched railway bridge along the way.
Turn right into Denne Road and then left into Normandy, just before the large brick-built Normandy Centre. You will see St Mary’s Church straight ahead. Follow the path to the right of the church to return to your starting point at the end of the Causeway.