Open-water swimmer Stephanie Montero finishes a 450 km Puerto Vallarta swim challenge to raise 1.5 million pesos for humpback whales and coral.
On Sunday afternoon, Montero touched the arch at Los Arcos on the Malecón after completing the “Reto Mar y Montaña”, or Sea and Mountain Challenge. The route began on 29 November and combined open-water swimming, paddle boarding and mountain cycling across Jalisco and Nayarit.
The challenge was designed as a 444-kilometre circuit linking nine protected natural areas and one more site that conservationists want officially recognized. By the time the team reached Puerto Vallarta, Montero said they had logged a little more than 450 kilometres, often swimming at night to keep the schedule on track.
Four athletes shared the effort. Montero swam three stages along the Costalegre coast, covering about 60 kilometres between turtle camps at Tecuán, Teopa, Islas Cocina and Chalacatepec. Fellow swimmer Angélica Enríquez took on sections around the Islas Marietas, while Diego Tron completed a full loop of Bahía de Banderas from Los Arcos de Mismaloya by paddleboard. Cyclist Marcela De Niz covered mountain sections and provided support along the way.
Organizers framed the route as a moving showcase of the region’s beaches, reefs and mountains. It passed through places that already have formal protection and others, such as Los Arcos de Mismaloya, that are treated as natural sanctuaries but still lack a full management plan. Montero, a physician who works on environmental health, described the protected areas of Jalisco and Nayarit as “maravillas” and said the team wanted people to see what is at stake.
The finish at Los Arcos on the Malecón drew tourism entrepreneurs, environmental advocates and local authorities from both Puerto Vallarta and Bahía de Banderas. But Montero stressed that the work is not finished. The challenge aims to raise 1.5 million pesos, and she acknowledged that the campaign has not yet reached that figure. Donations will stay open in the coming days.
From endurance sport to local action
Reto Mar y Montaña is the latest chapter in a growing movement that links extreme swimming with conservation in Bahía de Banderas. In previous editions of the Nado por las Ballenas initiative, Montero completed a 37-kilometre crossing from Islas Marietas to the south of Puerto Vallarta and a six-day, 127-kilometre swim around the bay. Those swims helped raise more than half a million pesos and supported the rescue of humpback whales caught in fishing gear.
The new challenge widens the lens. By stitching together turtle nesting beaches, coral reefs and mountain forests, the route underlines how connected the bay’s ecosystems are. Funds raised this year are earmarked for six conservation and education projects that work along that chain, from the open ocean to coastal communities.
According to campaign materials, the broader program channels money into teams that free whales from fishing nets, remove “ghost” gear left on the seafloor, and monitor whale-watching boats so they respect distance rules designed to avoid harassment and collisions. Other projects focus on restoring damaged coral colonies, cutting single-use plastics under the “Bahía Cero” banner and teaching local children how their bay functions as a nursery for marine life.
The need for that work is clear. Researchers estimate that around 200 boats offer whale-watching tours in Bahía de Banderas during peak season, making hundreds of trips a day. When vessels crowd animals or cut across their paths, humpback whales change direction, dive for longer and burn extra energy that should go to feeding their calves. Conservation groups in the region also warn about entanglements in fishing gear, the growing noise of engines and the plastic that washes into the bay.
Bahía de Banderas is one of the most important breeding and calving areas for humpback whales along Mexico’s Pacific coast. Every winter, animals arrive after a long migration from colder waters in the North Pacific. Calm, warm shallows near the coast provide a place to mate, give birth and care for newborn calves. That same mix of calm seas and close encounters has turned the bay into a whale-watching magnet, which means local protections have to keep up with the tourism boom.
Against that backdrop, the image of four athletes piecing together a 450-kilometre loop around the bay is more than a sporting headline. It is a reminder that protecting whales and reefs will depend on many small actions that add up over time: safer boat practices, cleaner beaches, better-managed protected areas and kids who grow up seeing whales as neighbours rather than tourist props.
Montero’s team has already done the hard physical work, from night swims off the Costalegre to long paddle days around the bay’s entrance. Whether the Puerto Vallarta swim challenge reaches its fundraising goal now depends on how many people decide that the future of Bahía de Banderas is worth backing with more than applause at the finish line.
