HOUSTON — For veteran marathoner and coach Jeff Horowitz , the toughest part of running isn’t the distance -- it’s keeping it interesting.

"People think it’s just one foot in front of the other," Horowitz said. "How does that not get boring?"

Horowitz, who has completed more than 200 marathons around the world, believes running should be treated like a relationship. It's something that requires creativity and care to stay fresh. It’s a philosophy at the heart of his new book, The Running Bucket List: 106 Ideas to Inspire Every Runner.

The book features more than 100 experiences designed to rekindle motivation, from small-town charity runs to the world’s most iconic marathons. Horowitz has raced everywhere from Antarctica to Berlin to the foothills of the Himalayas. He’s also run in Ho

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