(S) Start at Gayton Road in Harrow, turn left at Gerard Road and follow this road to the end. At the junction with Elmwood Road, go left. Go through the pedestrian access at the end of Elmwood Road and cross the railway via the footbridge to your right.
(1) Keeping to the right perimeter of Kenton Park, follow the path past the tennis courts and exit on Becmead Avenue, where you will get your first sighting of the Wealdstone Brook gushing out of its culvert just across the road from the park exit. Go left along Becmead Avenue and then right along Alicia Avenue. There are glimpses of the river snaking behind the houses to your right, and it appears again when you get to Kenton Lane.
(2) Join Kenton Road to your right and cross the main road to reach Woodcock Hill, where you will find the entrance to Woodcock Park to your left. Here the Wealdstone Brook emerges in its full glory and you can follow it right across the park to the Shaftesbury Avenue exit. (E)
The walk ends here, although it's possible to trace the progress of the river, mostly culverted, all the way to Wembley Park where it is visible flowing under Bridge Street within a stone's throw of Wembley Park Station on its route to the north of the Stadium, where it finally empties itself into the River Brent. You can rejoin Kenton Road for buses back to Harrow. Alternatively, navigate your way back to Harrow on foot. You can use the railway crossing at Northwick Park underground station and follow the path ahead of you past Northwick Park Hospital, then the bridlle path across the Harrow School Estate. Alternatively, cross the Met Line at Windermere Avenue and then the West Coast main line at Conway Gardens, which will take you round the southern perimeter path roound Northwick Park Hospital and back on to the Watford Road.