(Oregonlive) - Vintners began trooping north from California to Oregon nearly 50 years ago, enticed by the prospect of making wine right along the climactic edge of where grapes can consistently ripen. Now, with the 2011 harvest poised to get underway, the risks and rewards that make up both sides of that edge are starker than ever in the state's 850 commercial vineyards. The risks? Putting a year's worth of work and money into a crop that could still be washed out by relentless fall rains.