Granger Haviland speaks with EastIdahoNews.com reporter Cody Roberts. | Jordan Wood, EastIdahoNews.com ISLAND PARK — If you’re a city slicker like me, you probably didn’t grow up on the back of a horse. But at Haviland’s Old West Adventures, they’re happy to show you the ropes — and the reins. I visited Haviland’s Old West Adventures on Wednesday and took a horseback ride through the beautiful Harriman State Park. We saw plenty of birds, an elk …