This may be a bit out of REI's wheelhouse, but it would be quite useful to have a Scenic Drive layer to add to the already wonderful instances of the various projects (Hiking, Mountain Biking, Trail Running, etc). My favorite excursions usually include both hiking and driving, and there is a real lack of scenic drive data online. The crowd-sourcing method employed here is perfect.
While scenic drives aren't true outdoor excursions, they are quite close, and typically all into the "Get Outside" mantra. It is also a great way to reach a wider audience.