The Rhône Valley's run of superlative vintages over the past decade has supplied no shortage of great years to use when comparing recent releases. But for 2010, vignerons aren't just invoking comparisons to 2009 or 2007, the most recent vintages of note. Some are stopping at benchmarks such as 2005 or 1998, while others are reaching even further back—to 1990, 1985 and 1978, among the greatest vintages in the region's history—to set the stage for 2010. Simply put, the 2010 vintage reaches new heights in a region that has already been on an impressive roll. Wine Spectator's James Molesworth reports.