国道254号(信州街道、富岡街道)
道路概要
群馬県と長野県を結ぶ国道です。上信越道の下仁田ICから長野県佐久市に抜けており、上信越道の抜け道として利用することが出来ます。交通量は少なめですが、大型車が多いため、たまにペースを乱されることがあります。
完全な2車線道路で、群馬県側はストレートで緩やかに上っていき、山に近づくと突然カーブの連続するワインディングロードに変わります。独特な岩山の造形を眺めながら、内山トンネルまで一気に上りつめます。特に紅葉の季節は、すばらしい景色を眺められます。ただし、駐車スペースがほとんど無いので、車を停めることは出来ません。
内山トンネルを過ぎると、気持ちよいストレートが続きます。こちらはコスモス街道と呼ばれており、秋には道端にコスモスが咲き乱れます。八ヶ岳の山並みが見えてくるとゴールです。
(参考地図：昭文社 ツーリングマップル3 関東甲信越2006年版 53,54ページ)
完全な2車線道路で、群馬県側はストレートで緩やかに上っていき、山に近づくと突然カーブの連続するワインディングロードに変わります。独特な岩山の造形を眺めながら、内山トンネルまで一気に上りつめます。特に紅葉の季節は、すばらしい景色を眺められます。ただし、駐車スペースがほとんど無いので、車を停めることは出来ません。
内山トンネルを過ぎると、気持ちよいストレートが続きます。こちらはコスモス街道と呼ばれており、秋には道端にコスモスが咲き乱れます。八ヶ岳の山並みが見えてくるとゴールです。
(参考地図：昭文社 ツーリングマップル3 関東甲信越2006年版 53,54ページ)
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