Yes. On the moors in Scotland in August - generally with people who bring their dogs up for glorious 12th, lacking heather leg fitness, humid/warm temps. Also, in greyhounds - back in the 80s when a friend was one of the top greyhound vets in the country.
Just bear in mind if bloods are taken that the rise in Creatinine Kinase is quite acute and transient. Myoglobinuria lasts longer. It does occur, most often in sled dogs and greyhounds.