Went to El Pelon Taqueria on the way to the Red Sox game on Saturday -- we usually go to Burrito Max in Kenmore Square but read about El Pelon in the recent Calendar magazine -- they raved and so will I.
We got two burritos -- veggie and braised pork -- each was filled to the brim with the advertised fillings including rice, beans, salsa, etc. The burritos were spicy and far more interesting in flavor than any burrito I've had before. Claim to fame is the "grilled" tortillas and quality of the ingredients.
Downside was the wait for our to-go order -- it was easily 20-25 minutes with only 4 small orders ahead of us. I guess quality takes time :-) Next time we'll call in advance from the car.
The two burritos (no drinks) came to about 10 bucks. I've included the link to their website below. I would definitely recommend them if you find yourself over by Fenway.