We have a 6 month old westie and live in the Adirondacks in New York State. We usually walk him about 4 miles per day but with spring and summer approaching, our hiking boots are screaming at us from the closet. A typical summer hike for us is somewhere between 7-15 miles, with a vertical ascent of about 2000-3000 feet, rarely going for long hikes that may include total ascents of 5000-8000 feet. We would love to take Calvin with us when possible, and were wondering if any of you out there knew how much he could handle, or how long it would take him to get in shape for a 15 or 20 mile day hike. Thanks!