The 346 km Trans Pennine Trail stretches coast to coast across England, hitting some of the top historic cities and sights along the way. A leg of the trail runs right through Liverpool, and it’s one of the best bets for a long run in the city. We’ve mapped a 17 km (10.7 mile) section. The north end is at New Hall, where the path meets the Leeds to Liverpool Canal Trail. Continue as far south as Speke. Most of the path is paved, with a few nice gravel and crushed stone sections. It’s possible to access the route at any point along the way, but some of the key entrances include Rice Lane Recreation Ground, Walton Hall Park, and Halewood Park.
This website has excellent information about the trail.