Hi there, that's great! I know MORE and appreciate their work. And, I especially appreciate your work in the arena of mapping paths. Please keep it up. It is a passion of mine as well. I've done a project with the staff and Friends of Patapsco Valley State Park to map all authoritative trails there in precise detail and have done similar project at the various reservoir watersheds. I hike and trail run, but not really MTB--something I'd love to try.

If you don't know the surface, totally fine to leave blank. I will often put in the type of 'unpaved' as a placeholder when I know its not a paved path, but not much else. On the topic of surface, OSM has weird surface types that don't always line up to American English. Some trail ones to watch for:

- gravel: only used on trails and tracks that have golf ball-sized gravel. Examples would be BGE access roads where they dump gravel in as the bed.
- compacted: what we mainly think of as "gravel". The NCR trail is compacted. Its a mix of fine gravel and dirt smashed into a rollable surface.
- fine_gravel: pea sized gravel that is loose and hard to ride on any bike. Not common.

If you find new trails, I'd love to know about them! I do a fair bit of exploratory OSM hiking/running, so if you'd like to, we could exchange contact infos or send them via OSM messaging.

Don't worry about the boundaries too, I fixed the ones I noticed.

Also, one other tip: the OSM standards for tagging route color are tricky. The way to do this is by setting up a route relation and then putting that information on the route. There's instructions on the wiki but it is an advanced process that may require other software. If you find some of them, let me know and I'll help you. You can also see all the trails with routes using this waymarked trails tool https://mtb.waymarkedtrails.org/#?map=13.0/39.2426/-76.7486 

The example above is PVSP.

Happy trails, please feel free to ask any questions.

Elliott