In reply to Annaproffitt:
On Carn Dearg Buttress on Ben Nevis, Route 1 (fairly short) or Route 2 Direct. A long committing route covering some impressive ground at the grade. Less than 2 hours to the base.
Alternatively, could always link lots of routes on different crags at Polldubh in Glen Nevis - could easily do well over 300m of climbing. Starting with Pinnacle Ridge (3 minute approach!). After high crag, continue further up the hill to the little frequented crags of Upper Polldubh.
I'll also second DaveHK's suggestion of Ardverikie Wall - superb immaculate rock in a beautiful setting. Approach, and especially the descent even better if you've got bikes.