Bahía de Topolobampo is one of the largest natural bays on Mexico's Pacific coast — a vast enclosed harbour protected from the open sea by a chain of barrier islands. The water is deep enough to accommodate cargo ships and cruise liners, which is why Topolobampo grew into a serious port, yet the bay remains rich in wildlife. Dolphins are a near-daily sight in the main channel, and the mangroves lining the northern shore shelter herons, egrets, roseate spoonbills, and large numbers of migratory shorebirds in winter.
Boat tours of the bay depart from the Topolobampo waterfront and can be arranged through local operators or informally with fishermen. The estuary and mangrove channels to the northwest of the port are the best birding spots, accessible only by small boat. Keep an eye on the horizon for Isla Farallon, a rocky outcrop visible from the harbour that hosts a large pelican breeding colony each spring.
The Baja Ferries terminal at the inner end of the port runs overnight sailings to La Paz in Baja California Sur — a practical option if you are continuing north on the peninsula. The crossing takes about 16 hours and is comfortable on the larger ferries, which have cabins, a restaurant, and outdoor deck space for watching the coastline fade into open sea.