Trailcatalog organizes OpenStreetMaps trail relations into a searchable catalog. It syncs to OSM every Monday and Thursday at 2am PST. https://trailcatalog.org
This uses my JS framework Corgi. I think it's cool and I hope you do too.
This project depends on Google's S2 Geometry Library and we host an S2 cell viewer at https://s2.trailcatalog.org. Left-click to toggle cells, right-click to see cell information.