Every year, millions of monarch butterflies undertake an extraordinary journey, traveling over 3,000 miles from the United States and Canada to the forested mountains of central Mexico. This remarkable migration is a natural phenomenon that draws nature enthusiasts and curious travelers from around the globe, and is one of our most popular tours.

The Journey

The monarch butterflies begin their southward migration in late August to early September. These delicate creatures, weighing about a quarter of an ounce, navigate using a combination of environmental cues and an internal compass. They travel up to 100 miles per day, riding warm air currents and gliding to conserve energy.

What makes this migration even more astounding is that no single butterfly completes the entire round-trip. The monarchs arriving in Mexico are the great-great-grandchildren of those that left the previous spring. Yet, they find their way to the exact same forests their ancestors inhabited, guided by an innate, generational memory that scientists are still working to understand fully.

The Sanctuaries

In Mexico, the monarchs seek refuge in the oyamel fir forests of the Trans-Mexican Volcanic Belt. These high-altitude forests provide the perfect microclimate for the butterflies to survive the winter months. Three of the most renowned sanctuaries for viewing this spectacle are El Rosario, Sierra Chincua, and Piedra Herrada.

Located in the state of Michoacán, El Rosario is the largest and most visited monarch butterfly sanctuary in Mexico. Here, travelers can witness millions of monarchs clustered together on the branches of oyamel firs, their wings creating a blanket of orange against the green forest backdrop. The sanctuary offers well-maintained trails and knowledgeable local guides who work together with our Tour Managers to share insights about the butterflies and the conservation efforts to protect their habitat.

Sierra Chincua, also in Michoacán, offers a more rugged and less crowded experience. This sanctuary provides a unique opportunity to observe the butterflies in a more pristine setting. Visitors can hike or ride horses through pine and oak forests before reaching the monarch colonies. The journey to Sierra Chincua itself is part of the experience, offering panoramic views of the surrounding mountains and valleys.

Piedra Herrada, located in the State of Mexico, is another significant sanctuary in the Monarch Butterfly Biosphere Reserve. This sanctuary is known for its accessibility and well-maintained facilities. Visitors can enjoy a moderate hike through beautiful forest trails to reach the butterfly colonies. Piedra Herrada offers a unique perspective on the monarch migration, as it’s situated at a slightly lower altitude than some other sanctuaries, potentially providing different viewing conditions and butterfly behaviors.

Arriving at these sanctuaries between November and March, visitors are treated to an awe-inspiring sight. Millions of monarchs hang in clusters from the trees, their combined weight sometimes causing branches to bow. When the sun warms the air, the butterflies take flight, filling the sky with a fluttering orange cloud and creating a soft buzzing sound.

The best time to visit is typically from mid-January to early March. During this period, the butterflies are most active, often engaging in mating behaviors as they prepare for their northward journey.

Culture & Conservation

For the local indigenous communities, particularly the Purépecha people, the arrival of the monarchs holds deep cultural significance. The butterflies’ return coincides with the Day of the Dead celebrations in early November. Many believe the monarchs carry the souls of departed loved ones, returning to visit for this important holiday.

This belief has fostered a strong connection between the local communities and the butterflies, contributing to conservation efforts. Many former loggers have become butterfly guardians, working as guides and protectors of the forest ecosystem.

Despite the beauty and wonder of this migration, monarch butterflies face significant challenges. Climate change, deforestation, and the loss of milkweed plants (the only food source for monarch caterpillars) in North America have led to a dramatic decline in monarch populations over the past two decades.

Conservation efforts are underway on both sides of the border. In Mexico, logging bans and reforestation projects aim to protect and expand the monarchs’ winter habitat. In the United States and Canada, initiatives to plant milkweed and create “monarch waystations” provide essential resources for breeding and migrating butterflies.

Visiting the monarch sanctuaries can play a crucial role in their conservation. Tourism provides an economic incentive for local communities to protect the forests and butterflies. However, it’s essential to visit responsibly: Stick to designated trails to minimize habitat disturbance; maintain a respectful distance from the butterflies and never touch them (though some will more than likely land on you!); and when you’re there, support local communities with tips and/or purchasing locally-made crafts.

Witnessing the monarch migration is more than just a visual spectacle: It’s an opportunity to connect with one of nature’s most extraordinary cycles.