This route was created by Norfolk council, it is really well sign posted with white arrows in a blue circle. It takes you through fields, boardwalks and some quiet roads. At points it overlaps with the Wherryman’s Way. Lots of links to local history. The route is circular but does include an out n back to the New Inn pub (or you can start/finish there). There is a car park near there. 

https://www.norfolk.gov.uk/media/18811/download/pdf/rockland-st-mary-7-… 

Absolutely stunning route with an excellent combination of everything that makes a trail run in SWBC fun. Steep climbs, rolling forest paths and meadows, creek crossings, a bit of routefinding and excellent scrambling to top it all off. Also its only 30 minutes from Squamish and any vehicle can park right at the trailhead.
 

If timed right you wont have to cross any snow on route, there will be minimal bugs and you’ll run into minimal people until the descent. You'll find plenty of water on route to refill.