Before becoming a renowned Artist he spent years 'hardcore surfing' cheffing and modeling (i wonder if that was hardcore too?). He is also the founder of the long running travelling farm dinner series 'Outstanding In The Field' which has apparently inspired intrest in the farm to table movement across the country. You can read more about that on the 'Outstanding Field' website, have a read, it's actually quite inspiring... a little River Cottage - ish (but he's more attractive than Hugh).
I won't go on about how much I love the temporary nature of his work, it's connection to place and how it comments on the value of art... because that would be boring*. So, suss it out. Seriously beautiful stuff.
Works on sand
Work on ice
in March of 2010, Jim Denevan and his crew created a large scale artwork on the frozen surface of Lake Baikal, Siberia. The spiral of circles, along a fibonacci curve, grow from an origin of 18" to several miles in diameter.
The project is currently featured on The Anthropologist and is the subject of an upcoming documentary directed by Meredith Danluck.
Works on earth
You can see more of his work on his official website.
Or see what he has to say on this short clip, it's a little fruity but I like a lot of what he has to say.