Here is the website for Massimo's business, gardaexplore:
He teaches all sorts of cool stuff, like Nordic walking, mountain biking, etc. and can arrange special tours for specific places and interests. He is an excellent tour leader and I highly recommend his services.
Keep in mind GranFondo Cycling for great tours like the Italian classics, granfondos, and particularly the Maratona del Dolomiti; they have special in for entry applications, which are done by lottery otherwise.