App that tracks sun AND incorporates topography?

I live in an extremely mountainous place (Juneau, Alaska) and am looking for an app that will not only track the position of the sun at any given time on any given date at a certain location (like Suncalc or Photo Epherimis) but that ALSO incorporates topography into that calculation. We have huge shadows cast by the mountains here, and that is an important consideration.
Any ideas?
Thanks.