I have an existing, functional website, [url removed, login to view], that I just launched last month. The site is intended to allow runners from cities throughout the country to plan, organize, and find group runs and/or races. From the homepage, users can click on their respective city, from there they can view all the runs happening in their area or post a run themselves to share. All runs are open, public invitations to connect and run (think meetup.com- but exclusively for running, and with a more localized focus). As the site gains exposure, I will look to monetize it by requiring race organizers to pay if they are posting races that cost money.
Please view the site, [url removed, login to view], and explore the post page with the needs I have stated in mind.