I have "stand-alone" unit - TrailForks map is preloaded but locked. You need to unlock it once with your TF account. On the software that was otriginally loaded I was getting error when trying to unlock…
Summary -
Trailforks is included on all versions (bundle or not).
This comes as a separate transparent map with colored lines that stack on top of the existing city maps. This is not 'built into' the city…
I have "stand-alone" unit - TrailForks map is preloaded but locked. You need to unlock it once with your TF account. On the software that was otriginally loaded I was getting error when trying to unlock the map (it promted me to unlock when going to "MTB Trail Navigation"). Then the SW got updated to 3.20 and the menu and TF map were unlocked.
One cool feature on the 830 is that when I stop on a trail it automatically shows the map. No scrolling required. Not worth an upgrade but just something I noticed.
The integrated features with downloading routes from Trailforks is very convenient. I select a ride, add it to my wishlist, and it's available as a course. This is pretty sweet.
Summary -
Trailforks is included on all versions (bundle or not).
This comes as a separate transparent map with colored lines that stack on top of the existing city maps. This is not 'built into' the city maps but you can turn it on/off to overlay it.
You can 'donate' on Trailforks site to download these same maps (per state) to get them as overlap maps like this, or a full city map without OSM maps if you are on an older device, such as the 1030. Altho it probably won't do the following.
I do like what Garmin has done in that it has all the data overlaid. Originally it would get too crowded as it shows both Trailforks maps and the same (OSM) maps.
Garmin has updated the firmware so 'MTB' ride mode to essentially clears out all the OSM data if you are zoomed into the map, so it's easier to read the trails. You must zoom back out to see the OSM data (which is still important). This could be handy in issues where Trailforks only has a few maps and OSM has more data (not common but it happens). Tho it can be a pain to zoom out to see that data, I can't really think of a better solution aside from an on-map toggle button. But I wouldn't really expect stuff like that to get implemented as that's just one user's idea.
I thought the above update was a BUG or faulty map at first, then I read the release notes and it ticked. One of those "oooh I get it" moments.
Keep in mine, if you run your own custom maps (topo, etc...) the Trailforks map networks will clear out any of those graphics when zoomed in. It only does this where the maps exist. Think of tracing the Trailforks maps with a poligon layout. Anything within that shape will clear out other maps once zoomed in, while you can still see the other map data outside of the Trailforks maps area.
Again, zooming out then renders all maps.
I don't think any of the map options let you specify the zoom level where this occurs. If anyone knows otherwise I'd be interested to hear.