Scenic paved bike and walking trail on Mackinac Island’s 8.2-mile loop, with Lake Huron shoreline, limestone cliffs, cyclist riding M-185, and Devil’s Kitchen.

Complete Guide to the 8.2-Mile Perimeter Loop on Mackinac Island

Introduction: A Legendary Route Around a Car-Free Island

The 8.2-mile perimeter loop around Mackinac Island, officially known as M-185, is one of the most scenic and iconic trails in the Midwest. As the only state highway in the U.S. that prohibits motor vehicles, this car-free loop offers an immersive experience of Michigan's natural beauty, historic landmarks, and peaceful waterfront vistas. Whether you choose to bike, walk, or run, the M-185 loop provides a relaxing way to explore the entirety of Mackinac Island at your own pace.

This guide, presented by The Inn at Stonecliffe, offers a comprehensive look into every aspect of the Mackinac Island loop. From scenic highlights and historic stops to planning tips and accessibility, you’ll find everything you need to know to make your journey unforgettable.

Note: The Inn at Stonecliffe reopens each spring and is closed during the winter. For the best experience, plan your loop adventure between late May and late October.

What is the Mackinac Island Perimeter Loop?

Quick Facts About the M-185 Loop

  • Length: 8.2 miles

  • Surface: Paved asphalt trail

  • Vehicle Access: No motor vehicles allowed

  • Traffic: Shared by bicycles, pedestrians, and horses

  • Route Type: Loop trail that circles the island

  • State Highway Designation: M-185

This loop runs directly along the shoreline of the island, offering uninterrupted views of Lake Huron, Mackinac Bridge, and surrounding rock formations. Most visitors begin the route near downtown, but you can enter at any point on the island.

How to Experience the Mackinac Island Loop

Biking the Loop

Biking is the most popular way to explore the M-185 loop. Rentals are widely available near the ferry docks and downtown area.

Why Biking is Ideal:

  • Most people complete the loop in 60 to 90 minutes

  • Ideal for all fitness levels

  • Multiple scenic rest points and attractions along the way

  • Great for families and group rides

Bike Rentals & Services:

  • Island House Bikes

  • Mackinac Cycle

  • Ryba's Bike Rental

  • Tandem bikes, kids' bikes, trailers, and e-bikes available

Pro Tip: Bring a water bottle and light snacks. There are picnic spots at British Landing and Arch Rock.

Walking the Loop

Walking the loop offers a slower, more immersive experience.

Key Notes:

  • Allow 3 to 4 hours for the full loop

  • Enjoy uninterrupted shoreline views and wildlife

  • Ideal for photographers, solo travelers, or romantic strolls

Running the Loop

Fitness enthusiasts often choose this trail for scenic jogging.

  • Loop is flat with very mild elevation changes

  • Popular for early morning or evening runs

  • No car traffic makes it safer than most roads

Scenic Stops & Landmarks Along the Loop

Landmark Approx. Mile Marker Highlights
Arch Rock Mile 1.7 Natural limestone arch 146 ft. above the lake
British Landing Mile 4.1 Picnic area, restrooms, snack stand
Devil’s Kitchen Mile 6.7 Unique rock formation and photo spot
Mackinac Bridge View Mile 7.5 Unobstructed view of the Mackinac Bridge
Downtown Start/Finish Mile 0/8.2 Shopping, dining, and ferry access

Additional stops include:

  • Skull Cave (just off the loop)

  • Fort Holmes Overlook (requires detour uphill)

When Is the Best Time to Do the Loop?

Seasonal Considerations

  • Spring (Late May – June): Fewer crowds, lilac blooms, cooler temperatures

  • Summer (July – August): Warmest weather, busiest season, longer daylight

  • Fall (September – October): Crisp air, fall colors, fewer tourists

Avoid winter: The loop is not maintained for public use during snowy months and The Inn at Stonecliffe is closed for the season.

Time of Day

  • Morning: Ideal for runners and photographers (soft lighting)

  • Afternoon: Warmest and most active period

  • Evening: Quieter, golden hour, sunset views on the west side

Is the Mackinac Island Loop Family-Friendly?

Absolutely. The trail is accessible and safe for families with children.

Family Perks:

  • Flat, paved surface for strollers or balance bikes

  • Plenty of stops for breaks

  • Horse-drawn carriages and butterfly house detours for kids

Safety Tips:

  • Keep right and signal when passing on bikes

  • Children should wear helmets

  • Bring sunscreen, water, and layers

Accessibility and Terrain

The M-185 loop is one of the most accessible trail systems in Michigan.

Accessibility Highlights:

  • Wheelchair-friendly for most of the trail

  • Wide paved path with little incline

  • Horse-drawn carriage tours available for non-riders

FAQs: Everything Else You Might Be Wondering

Can I complete the loop if I only have an hour?

Yes, by biking nonstop, the average adult can complete the 8.2-mile loop in 60 minutes or less.

Are there restrooms along the loop?

Yes. British Landing has public restrooms and seasonal snack shacks.

Is the loop suitable for young kids on bikes?

Yes, especially with supervision. Tandem and tag-along options are also available.

Are there food options along the trail?

Only at British Landing. Pack snacks if you plan to stay out for several hours.

Is there cell service along the loop?

Yes, but it may vary in strength depending on your carrier.

What makes this loop unique?

It is the only highway in the U.S. where motor vehicles are banned, and it hugs the island's natural shoreline completely.

Extend Your Adventure: Stay at The Inn at Stonecliffe

Located just a short ride from the loop, The Inn at Stonecliffe offers a tranquil, hilltop retreat with spectacular views of the lake, sunset, and Mackinac Bridge. After a day on the loop, return to:

  • Relax in elegant, renovated guest rooms and suites

  • Dine al fresco or enjoy cocktails with a sunset view

  • Explore nearby wooded trails or lawn games

The Inn reopens each late spring and is an ideal home base for your Mackinac Island adventure.

Summary: Why the 8.2-Mile Loop Belongs on Every Visitor's List

The Mackinac Island perimeter loop is more than just a trail — it's a living, breathing experience of Michigan's natural beauty and cultural legacy. Whether you're a first-time visitor or a returning guest, this loop offers:

  • Incredible Lake Huron views

  • Unique geological formations

  • Historical touchpoints

  • Unmatched peace in a car-free environment

Plan your visit for spring through fall, and let The Inn at Stonecliffe be your starting point for this unforgettable adventure.

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