So even though my new project idea does not involve racing, endurance sports, trail running or even mountain biking, it is certainly complementary with every one of these activities.
And it passes the 3 part test defined by Dictionary.com as adventure:
ad·ven·ture[ad-ven-cher] noun, verb, ad·ven·tured, ad·ven·tur·ing.
an exciting or very unusual experience.
participation in exciting undertakings or enterprises: the spirit of adventure.
a bold, usually risky undertaking; hazardous action of uncertain outcome.