We'd often take him (his name was Jake) to walk the beach between Oceanside and Netarts, about 4 miles round trip. It'd take us about 3 hours at an ambling pace, watching the sea and birds and whatnot.
He loved to retrieve a tennis ball, and I'd learned that the best method to keep him (and my throwing arm
) happy was to carry an old SS tennis racket to send the ball down the beach. So we'd walk maybe 30 feet while he sprinted about 200 feet out and at an easy run 200 feet back, ready for another go.
When he'd get warmed up, he'd run through the low surf to cool off on the way back...but never stop to rest. 4 miles for me, by my rough calculations 60ish miles for him...at a full sprint at least half of that. In 3 hours.
Incredible cardiovascular and muscular condition.
Also the smartest dog I've ever known. Learned commands so quickly. At 3 months old he learned to heel in about half an hour. Sit took about 10 minutes. One of the few dogs I have known that intuitively understood what I meant when I pointed at something...without being taught, he'd look where I was pointing, not at my hand.