I discovered that some of their buses travel down the A9 in walking country. I booked a single from the bus-stop on the A9 at Dalwhinnie to Dalnaspidal Lodge having phoned to reserve a place and confirm a price. Price £3.70 for about 10 or 11 miles. As there was no bus-top or layby at Dalnaspidal where I had parked my car, the driver continued to the next southbound layby on the A9 and I had to walk back to my car. I have emailed to query whether it should be advertised as a southbound stop. They do advertise as "free for concession card holders".