They called him Elvis, even though his official name was Abrams, after the battle tank. He was rugged and strong and attacked hills with gusto. More than that, he was patient and reliable, a horse you could trust.

He was diffident in his youth, but gained confidence as he matured, becoming the premier ambassador of the Point Reyes National Seashore’s Morgan Horse Ranch. The most glittering entry on his equine resume was an appearance at…