QUOTE(sledzeppelin @ Feb 10 2008, 10:38 AM)

That depends on what you mean by overlays. You can record your own tracks or download them from elsewhere and overlay them on the DeLorme maps, but you can't overlay other maps, as far as I know.
What is a good unit to buy, I would like to stay with GARMIN, I have that in 2 vehicles, I want to get trail maps for NY and CO and I guess put them over topo maps?? I'm just getting back into sledding this year, when I used to ride, mid-late 80's, didn't have things like this. I'm not too worried about cost, I believe spend it the first time and get a good product. I can use all the help I can get....THANKS Also I am thinking of going to Tug Hill next Sat, I live in Richmond VA, so if anyone would let me ride with them it would be great, I have never been....