Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very Useful!

The map is just what it says it is - a map of the Tahoe Rim Trail. It is configured to give trail distance, changes of elevation, camp sites, water sources, trail junctions and crossings. All of this comes in a compact, waterproof package perfect for taking on the trail. If one needs maps of other routes, e.g., ones that include segments of other trails in addition to the Tahoe Rim, then one needs one or more other maps. However, this one is just right for Rim trail hikers.