Celandine walks - Hillingdon CouncilEnjoy a 12-mile walk along the River Pinn (Pinner) to the Grand Union Canal (Cowley).Whether you want to walk the whole Celandine Walk route or a smaller section, you can download and print (or save) the relevant route map(s) below and follow these routes at your own leisure. The Lesser Celandine is an early flowering small woodland plant https://www.hillingdon.gov.uk/article/4883/Celandine-walks