Alsace's Route des Vins stretches 170 kilometres from Marlenheim to Thann, yet the dozen kilometres radiating from Colmar concentrate seven Grand Cru appellations within pedalling distance. The volcanic slopes of Hengst and Schoenenbourg face east, capturing morning light that has ripened Gewurztraminer and Riesling since Benedictine monks planted the first vines in the eighth century. By 1293, Colmar's guilds regulated barrel sizes and mandated that only estate-grown grapes could bear the town seal, a quality discipline that predates France's appellation contrôlée system by six centuries. Today's vineyard paths follow medieval cart tracks linking Turckheim, Eguisheim, and Riquewihr, three fortified wine villages whose cobbled centres remain unchanged since the Thirty Years' War. Eguisheim's concentric ramparts spiral around a thirteenth-century castle where Pope Leo IX was born in 1002; Riquewihr's Dolder Gate still collects tolls in name, its tower crowned with storks' nests each April. Between these settlements, public cycling routes thread through 4,500 hectares of vines, passing roadside crosses and open-air fermentation tanks where winemakers monitor harvest by bicycle rather than car. The Alsace wine bike tour format emerged in the 1980s, when Strasbourg's cycling culture collided with oenophile demand for access beyond the tasting room. Guides now lead groups through single-estate domaines that open cellars by appointment only, pouring wines directly from temperature-controlled casks. Self-guided riders follow signposted loops marked by yellow bicycle pictograms, stopping at cooperatives where €8 buys a tasting flight of six vintages. The terrain rises gently, 120 metres of elevation over ten kilometres, manageable on a city bike yet sufficient to shift microclimates; Riesling dominates the cooler upper slopes, Pinot Gris the warmer mid-elevation bands. Colmar anchors this network not by accident but by hydraulic logic. The town sits where the Logelbach stream meets the Lauch River, two waterways that powered mills and supplied the barrel-making trade for eight centuries. Nineteenth-century coopers stamped Colmar's coat of arms on casks shipped to Paris and Brussels, a geographic branding that persists in modern wine labels. The cycling infrastructure reflects this legacy: bike paths now occupy the towpaths where horses once hauled wine barges toward the Rhine.