Clearfield, Main Street off the Antelope exit, across from the Front Runner station, Manuel's El Burrito...fantastic, great price on everything, chile verde is tops, smothered chile verde or colorado burrito is great. Enchiladas and fajitas are very good. And they have a buffet, $8.99 ayce.
Red Iguana is over-rated. Only go there if you are a huge mole fan, they have several and all are authentic, and everything has one of the moles in it. Just they don't all taste very good.