Three good places to go in Eau Claire, plus ratings of the rest.
Taqueria Sandova- 1 La Luna Misma - New Owners, New Name, Same great food. Located in the back of Eau Claire's largest Mexican Grocery, this is pretty much just what its name is - Tacos, plus Tortas, Burritos and Soups, The environment is low end tables and chairs, but if you're lucky you will be able to watch soccer in Spanish. Not a date place, unless your date loves the best Mexican food in the Chippewa Valley. Always amusing to see employees from other "Mexican" restaurants eating their before their shifts.
#2 Taco's Juanita - close behind is a slightly more upscale place, with a little more atmosphere and a few more fancy meals as well as some of the more traditional Mexican as well as some Amer-Mex fare
#3 Casa Mexicana - Chippewa Falls contribution to the top three, Casa houses some of the wildest wall fresco's, chairs and tables you will see. The food tends more towards Amer-Mex, but still good enough. Full Bar, so that is something not available at the top 2. The quality starts falling fast after the top 3, although there are plenty of choices. The order is basically which would I go to first (or last, as the case may be)
For all the rest, click on the above Yelp link