We found. . . article on the proposed North Country Trail [Weekend, November 10] most interesting. The account of the Ms. Carolyn Hoffman's seven-month trek along the 3,200-mile proposed route was a well earned tribute to a very considerable undertaking. All of us at the Heritage Conservation and Recreation Service sincerely appreciate the efforts of Ms. Hoffman and the International Backpackers to assist in obtaining recognition of the route by Congress and its designation as part of the National Trails System, as recommended in the North Country Trail report. Because of our leadership role int he study, however, we woul like to correct an apparent misinterpretation. . . Ms. Hoffman was quoted in the article as saying that the report". . . was drawn up by people in Washington who obviously didn't know what they were looking at.". . . To set the record straight, the route described and shown in the report was not intended to be the specific, on-the-ground location of the trail. . . As the report says, "It was decided that the location of a conceptual (emphasis added) 10-mile-wide corridor would be more feasible than attempting to locate a specific trail tread. One reason for this approach was that changes in land use might occur which could require trail relocation between the time of the study and the time the trail might be authorized by the Congress. Secondly, the time alloted for the study would not permit an actual route survey of the 3,200-mile trail. The corridor concept would also give managing agencies a reasonable amount of flexibility with actual trail location and construction."