50°47′38″N 4°01′19″W / 50.794°N 4.022°W
The West Okement is a river in north Dartmoor in Devon in south-west England. It rises at West Okement Head near Cranmere Pool and flows in a generally NW direction past Black-a-Tor Copse and into Meldon Reservoir. After exiting the reservoir it flows in a generally northeast direction towards Okehampton, where it joins the East Okement River to form the River Okement. Its total length is roughly 16 kilometres (10 mi).[citation needed] It is crossed by Meldon Viaduct.