Discover Great Marsh Trail

The Great Marsh Trail is 1.2 miles long and runs through the largest interdunal wetlands in the Lake Michigan watershed. The marsh is a vital habitat for plants and animals, and visitors can take advantage of the accessible observation deck to see some of the hundreds of species of birds that visit during their long migrations or make the area their home. Separated from Lake Michigan by a majestic dune ridge, the trail is only minutes from the shore. 

While once people believed that wetlands like the Great Marsh should be drained for development, today we understand that they serve vital functions in preventing flooding and erosion, and helping to protect our drinking water.

Aerial view of the Great Marsh Wetlands

The Geological Story of Great Marsh Trail

During the last ice age, glaciers advanced and receded, leaving behind the massive dune ridges that run along the southernmost shore of Lake Michigan. Water from melting ice and enormous waves was separated from the lake by the mighty dunes, and formed the basis for the Great Marsh. Unlike swamps, which typically include a variety of trees, the wet soil that makes up the marsh support a variety of shrubs, bushes, and grass.

This remarkable wetlands habitat once spanned twelve miles. As the region was settled, farmers and developers drained much of the wetlands. Today, the National Park Service and other environmental organizations work hard to preserve this important habitat.

A bird in the Great Marsh Wetlands
A bird in the Great Marsh Wetlands
A bird in the Great Marsh Wetlands
A bird in the Great Marsh Wetlands
2 birds in the Great Marsh Wetlands
A bird in the Great Marsh Wetlands
A Hawk Moth in the Great Marsh Wetlands

Amazing Animals of Great Marsh Trail

Beavers were once rare in Indiana, after being hunted for their pelts in the 19th century. These shy and busy animals were reintroduced in 1935 and are now thriving. Evidence of their work can be seen in the Great Marsh both in their dams and in the chewing marks left on tree stumps.

Add-muskrats (differences between beaver), snakes, painted turtles, snapping turtles

TO ADD: RIGHT OFF THE MAIN PARKING LOT IS A PATCH OF FLORA THAT DRAWS MONARCHS, PRAYING MANTISES, AND HAWK MOTHS (THEY LOOK LIKE HUMMINGBIRDS WHEN THEY FLY)

A beaver in the Great Marsh Wetlands
2 turtles in the Great Marsh Wetlands
A muskrat in the Great Marsh Wetlands

Get Involved

Be the Change — Volunteer! Get more involved with the Indiana Dunes! There are many no-hassle, drop-in volunteer opportunities available for everyone. Just show up! The organization provides…

Be Safe

While the Indiana Dunes area is considered a safe, family-friendly destination, there still some things you need to know. In this video, we explore different safety tips and visitor…

Visit Off Season

This trail is a perfect birding location thanks to being the largest wetland complex in the Lake Michigan watershed. During the spring and fall migration birders can spot herons, egrets…

What to Expect

Guests can choose from two small parking lots at the Great Marsh Trail. The south lot features several gravel spaces for 8–10 vehicles and leads visitors to the main trailhead.  The north lot features a paved parking lot (with one handicap space and one regular space) which leads visitors to a wheelchair-accessible trail to the observation deck. The deck offers a spectacular view of the marsh and the birds that inhabit it.

Hikers can expect grassy trails with some sections of packed dirt along this 1.3 mile trail. Come prepared to wear appropriate footwear ideal for wet conditions as the trails can become muddy and slippery after a heavy rainfall.

Parking lot at Great Marsh Trailhead

Main Lot and trailhead (south):

  • Free to enter
  • Open daily from 6:00 am to 11:00 pm
  • 1.3 miles
  • No drinking fountains
  • No restrooms
  • Not wheelchair accessible
  • No handicap parking

An aerial view of the Great Marsh Trail

Accessible Lot (north):

  • Free to enter
  • Open daily from 6:00 am to 11:00 pm
  • .2 miles accessible path to boardwalk platform
  • No drinking fountains
  • No restrooms
  • Wheelchair accessible
  • One handicap parking space
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