The place is literally a pushcart with mainly outdoor seating and its demographic is 100% locals, BINGO. This is very important because a lot of places in Sayulita cater to gringos but "El Taco Riendo" is local all the way, the taste and pricing is proof. Steak tacos, amazing; their beef tongue tacos, amazing. Their tacos de cabeza, amazing, and yes I went native.
The taqueria is located on Jose Mariscal, less than a block away from the plaza. Tell them el Indio Tizoc sent you (they'll think you're crazy).