Guiding Ships and Monarch Butterflies
At the southern tip of the Stonington Peninsula, where the waters of Big Bay de Noc, Little Bay de Noc, and Green Bay meet, stands one of Michigan’s most scenic and historically significant lighthouse sites.
The Peninsula Point Lighthouse once served as a critical navigational aid for vessels traveling the busy shipping routes of northern Lake Michigan. Today, although its light no longer shines across the water, the lighthouse remains a beloved landmark. In addition, it is now an unexpected destination for another group of travelers: thousands of migrating monarch butterflies.
Its story combines maritime history and the work of dedicated lighthouse keepers. It also involves changing technology and the natural wonders that continue to draw visitors to this remote corner of Michigan’s Upper Peninsula.
A Dangerous Point Along a Busy Shipping Route
The Stonington Peninsula extends southward into Lake Michigan, creating a natural landmark that was both helpful and hazardous to mariners.
For ships traveling to and from the growing ports of Escanaba and Gladstone, the peninsula marked an important turning point along the route. Unfortunately, it was also the location of a significant navigational danger.
A shallow reef extends more than two miles into Lake Michigan from the tip of the peninsula. Combined with numerous rocks and shoals scattered throughout the surrounding waters, the area posed a serious threat to vessels. These vessels carried iron ore, lumber, fish, and other cargo through Bay de Noc.
Recognizing the danger, the federal government approved funding for a lighthouse in 1856. However, delays and the disruption of the Civil War postponed construction.
Additional funding was authorized in 1864, and the lighthouse was finally completed in 1865. From that point forward, Peninsula Point Light became an important guide for mariners. Therefore, it helped those navigating the waters between Green Bay and the Upper Peninsula’s growing industrial ports.
The Lighthouse and Its Keepers
Life at Peninsula Point revolved around the daily responsibility of keeping the light shining.
The station’s first keeper was Charles Beggs, who cared for the lighthouse until his death there in 1887. He was followed by Henry Corgan and then Peter Knutsen.
In 1889, Captain James D. Armstrong became keeper of the station. Armstrong and his family would call Peninsula Point home for more than three decades.
Like many Great Lakes keepers, Armstrong’s work required dedication and discipline. The light had to be maintained in all weather conditions. Furthermore, the grounds needed care, and the lantern had to operate reliably throughout the navigation season.
The isolated location meant that lighthouse families often lived far from towns and conveniences. As a result, they relied on one another while serving an essential role in maritime safety.
Captain Armstrong remained associated with the lighthouse until 1931, making him one of the longest serving figures in the station’s history.
Technological Changes Arrive
By the early twentieth century, lighthouse technology was rapidly evolving.
For decades, Peninsula Point Light relied on a traditional hand operated oil lamp and a fourth order Fresnel lens. These remarkable lenses, developed during the nineteenth century, allowed lighthouse beams to travel much farther than earlier lighting systems.
In 1922, the United States Lighthouse Service modernized the station by installing an automatic acetylene lighting system. The upgrade included a Dalén light and sun valve, technology that allowed the beacon to operate automatically.
The new system eliminated the need for a keeper to manually light and extinguish the lamp each day.
At the same time, the original fourth order Fresnel lens was removed and replaced with a smaller twelve inch lens. This smaller lens was equipped with a 300 candlepower acetylene flasher.
The new light displayed a distinctive characteristic, a one second flash followed by a nine second period of darkness. Mariners could identify the lighthouse by recognizing this unique pattern.
Because the station was now automated, full time occupancy was no longer necessary. Even so, Captain Armstrong continued overseeing the lighthouse for several more years.
The End of Active Service
As shipping routes and navigational needs changed, the importance of Peninsula Point Light gradually declined.
The construction of the Minneapolis Shoal Light Station farther out in Green Bay provided mariners with a more effective navigational aid. This was especially true for the routes most vessels were using.
As a result, Peninsula Point Light was decommissioned and abandoned in 1936 after more than seventy years of service.
Its active role in Great Lakes navigation had come to an end, but the story of the lighthouse was far from over.
A New Life as a Historic Landmark
In 1937, the United States Department of Agriculture Forest Service assumed responsibility for the property.
Soon afterward, the Civilian Conservation Corps began improving the site. Buildings were repaired, grounds were cleaned up, and public picnic facilities were added, making the area accessible to visitors.
The local Stonington Grange became an important steward of the lighthouse and grounds. Their efforts were widely recognized. Furthermore, in 1949 they received first place honors in a statewide competition for their preservation work.
Tragedy struck in 1959 when the keeper’s dwelling was destroyed by fire. The house was lost, but the lighthouse tower survived.
The Forest Service removed debris and repaired damage to the tower in 1962. This ensured that the most recognizable part of the station would remain standing.
Today, visitors can climb the cast iron spiral staircase inside the tower and step into the lantern room. Additionally, they can enjoy sweeping views of Lake Michigan and the surrounding shoreline.
A Lighthouse and a Butterfly Sanctuary
While the lighthouse’s role in navigation has ended, Peninsula Point continues to guide travelers of a different kind.
Each autumn, thousands of monarch butterflies pass through the area during their remarkable migration to Mexico. Like mariners before them, the butterflies use natural landmarks and shorelines to help navigate their journey.
The tip of the Stonington Peninsula extends into Lake Michigan, creating an attractive stopping point. Here, monarchs gather before continuing south.
Late August through September is often the best time to witness this extraordinary migration. Visitors may see trees, shrubs, and grasses covered with clusters of orange and black butterflies. These monarchs rest before continuing one of nature’s most impressive journeys.
The combination of maritime history and natural beauty makes Peninsula Point unlike any other lighthouse destination in Michigan.
A Lasting Symbol of Bay de Noc
Though its light has been dark for nearly a century, Peninsula Point Lighthouse remains an enduring symbol of Michigan’s maritime heritage.
It once protected vessels from dangerous shoals and marked an important turning point along busy shipping routes. Also, it witnessed the transition from hand tended lamps to automatic lighting systems. In addition, it served generations of lighthouse keepers and their families.
Today, visitors come not only to explore its history but also to experience the peaceful beauty of the peninsula. They also come for the annual monarch butterfly migration.
Standing at the edge of Lake Michigan, the lighthouse continues to watch over the waters it once helped mariners navigate. It preserves a connection to both the human and natural history of the Great Lakes.
Explore our full collection of Northern Michigan lighthouse stories here
Start planning your trip today and explore the legacy of Michigan’s maritime history!
📍 Explore the Map Below
