Driving from Seattle down to California along the I-5 can be a real drag, chow-wise. We were delighted last week to discover two real gems, one in Grant's Pass, OR, the other in Dunsmuir, CA.
In Grant's Pass, way off the tourist drag, we discovered the Taqueria Mexico, on H Street. It's a restaurant, not a taco place per se, and we had great food there. I had a Sopa de Mariscos that was huge, brimming with impeccably fresh seafood, and delicious, for $15. My husband pronounced his chicken enchiladas in tomatillo sauce to be excellent. The tortillas were fresh and hot, and the salsa was very good. I'd go there again any time. Normally I can't think of any reason to go to Grant's Pass, so this is high praise.
In Dunsmuir, in the Historic District, we found the Cornerstone Cafe and Bakery. Surprisingly, they had many great-looking vegetarian offerings, mixed in with a more regular menu. My grilled portobello burger on house-made focaccia was dynamite. My husband's BLT Stack sandwich with hand-cut fries had him purring, as did the chocolate chunk hazelnut cookie he finished with. Prices were very reasonable, and the food was high quality throughout.
These two spots will really brighten up your long drive. Check 'em out!