Fitness enthusiasts want more personalized competition than global Strava leaderboards offer.
Create a web app that lets communities design route-specific challenges (e.g. "Best time on Mont Ventoux this month") with custom rules and badges.
Local bike shops or running clubs would sponsor challenges to engage their communities, paying for premium features like branded leaderboards.
Start with manual challenge creation through a simple form, then automate verification against Strava API data.
Risk: Strava could build this natively, though they've historically focused on global features over localization.