Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Is it compatible with Garmin Montana 600?
Document: I bought this together with the Garmin Montana 650t handheld GPS unit for my girlfriend, but as it turned out I was mistaken in thinking it was something she would like - so we never even opened the package. That being said, I've used Topo digital topographic maps before, and they were great.
I bought this to go with a Garmin nuvi 50LM and it doesn't provide the level of detail I hoped for. I'll use in other Garmin GPS units I have
If you have a Garmin GPSmap 62 (not the 62s version) do not purchase this product. You can only use the DVD to load topographical maps. If you contact Garmin, make sure that you stress the non-S model of your device - and even then they may tell you to purchase the SD card. the plain GPSmap 62 does NOT have a slot for the card and will only download the maps from your computer.
this is what I have been looking for very high quality maps. I will use this sight again to further expand my topo collection
Wish I had bought it last year. I will use it more when the weather gets better. So far it is very nice to see elevations and trails.
If you lose the original card you'll not be able to use the maps even if you have backed them up.
I already had a DVD of lower resolution maps but decided to upgrade to 24K for the Northeast where I do most of my hiking and geocaching. The additional detail available in the 24K map is a huge plus. The only downside to having bought the SD rather than the DVD is that I was unable to make a functional backup of the SD. While the files may be copied onto another card (or hard drive) the maps will only unlock if they are on the original card.
Amazon was great with the purchase and return process. But remember, since Amazon did not make the mistake if you ordered the SD card instead of the DVD, the cost of returning the SD card will be yours.
Although I only used it for hiking in the Catskills. I use in a 60csx device. Worth the high price. Maps have good detail, shows 3d shading on newer devices (not 60csx). Now you can download topo maps for free online but what these maps have that the downloads don't is the downloaded maps wont show POI's, Parks, Streets etc all the stuff you want. There basically just a base map with Topo lines.Trust me these are worth it.
Answer: I believe it is with the montanas but i dont want to misinform you. If you go to the garmin site and look these maps up it will give you a list of comptible devices. Im almost 100 percent it is though.