RunFindr is a service that analyzes running route data and clusters similar routes together to recommend new routes to users based on their starting location. It takes in route data points, clusters the routes based on distance and location, then selects the best routes and allows users to refine the results further based on weighting preferences. The creator, Joerg Fritz, is evaluating features of the recommendations and whether the algorithm is effectively recommending new routes based on starting city and time of year.