In reply to pasbury:
How about Stanley Force from Boot?
Interesting bits of 'jungly' broadleaf woodland and gorge.
from the top, you can cut back East; either below the crags leading towards Harter Fell or along their tops. Plenty of escape routes back down to the River Esk for a riverside return walk.
Most of it's probably below the 1000' mark. You can make it as long a day as you want.