You should download the app
HikeArmenia, filter the region Tavush and you will see all the trails that are here. The app contains a map, navigation, short facts and description about the trails, reviews, guides, etc. Make sure to press the button “store offline” as soon as you choose the trail, so that you can find the information offline. Take into account that there is no reception in forest, so even if you have internet on your phone, it won’t work on trails.
You can also buy a topographic paper map from Diljan Tourist Information Center for 5000 AMD.