Boca Teacapan, lies 22.5 miles southeast of the Baluarte River and 44.5 miles southeast of Mazatlan. The mouth is marked by a light. A continuously breaking bar fronts the entrance and extends up to about 2 miles offshore. The lagoons are accessible only by small craft. Anchorage can be taken off the entrance, about 0.8 mile seaward of the outer edge of the bar.[1]