@rvaughnmd Good question. It depends on what I want to do: just cruise along in Z2 or really push it. For Z2 riding a long route like ‘Big Foot Hills’ is nice. Different sceneries, bit of climbing but not extreme.
For structured training I usually start out on Tempus Fugit and let my mood take me where I want to go.
And for climbing: Road to Sky. It is always a mental challenge due to the length of that climb.