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United States
Maine
Hancock County

Thunder Hole

Highlight • Natural Monument

Thunder Hole

Hiking

4.7

(31)

Cycling

5.0

(6)

Road cycling

5.0

(3)

Thunder Hole is a captivating natural monument located along the rugged eastern coastline of Mount Desert Island within Acadia National Park in Maine, USA. This distinctive geological formation, carved by the relentless power of ocean waves on granite, is renowned for the dramatic "thunderous" sound and spray created when powerful waves surge into a narrow inlet. Situated at sea level, it offers a unique demonstration of coastal erosion and tidal forces.

What draws visitors to Thunder Hole is the sheer…

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Acadia National Park

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    Tips

    February 16, 2023

    Hiking

    An hour or two before high tide, waves breaking against a pocket in the rocks trap air and make a thundering boom sometimes audible from up to a mile away. Thunder Hole is one of Acadia's most popular attractions and parking may be difficult in the summer; it is recommended to use the Island Explorer Park Loop bus when possible. Visitors on the lowest viewing tier may get splashed, and for safety reasons it is imperative that all visitors stay within the designated areas.

    More information on the park loop bus schedule: exploreacadia.com

    June 1, 2018

    Hiking

    Two hours before the flood, the thundering of the water into the rocks is best heard.
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    February 17, 2026

    Road cycling

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    Nearby routes

    Best routes near Thunder Hole

    5.0

    (26)

    194

    hikers

    1. Beehive, Gorham Mountain and Ocean Path Loop

    12.1km

    03:39

    260m

    270m

    Hike the Beehive, Gorham Mountain, and Ocean Path Loop in Acadia National Park for a diverse 7.5-mile adventure with coastal views and ladde

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    Moderate

    4.8

    (4)

    99

    hikers

    3.04km

    00:49

    40m

    40m

    Hike the easy 1.9-mile Ocean Path in Acadia National Park for dramatic coastal views, Sand Beach, and Thunder Hole.
    Easy

    4.8

    (44)

    424

    hikers

    Hike the moderate Gorham Mountain and Beehive Loop Trail in Acadia National Park, featuring thrilling iron rungs, coastal views, and summits
    Moderate

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    Location: Hancock County, Maine, United States

    Frequently Asked Questions

    What is the best way to access Thunder Hole, especially during peak season?

    Thunder Hole is easily accessible via the scenic Park Loop Road. However, during peak summer months, parking can be challenging. It's highly recommended to utilize the Island Explorer Park Loop bus to avoid parking difficulties. More information on the bus schedule can be found at exploreacadia.com.

    Are there any specific trails or routes that start directly from Thunder Hole?

    Yes, Thunder Hole is a key point along the Ocean Path, a picturesque 3-mile round-trip trail. This path offers stunning coastal views and connects Thunder Hole to other notable landmarks like Sand Beach and Otter Cliff. It's a relatively easy walk suitable for most visitors.

    What are the terrain and difficulty like for walking around Thunder Hole and the immediate area?

    The immediate area around Thunder Hole features modern walkway systems with wider paths, retaining walls, and handrails, making it generally accessible. However, visitors should be mindful of slippery ledges and unpredictable rogue waves, especially on the lowest viewing tiers. The Ocean Path, which connects to Thunder Hole, is a well-maintained, relatively flat walking route.

    Is Thunder Hole suitable for families with young children?

    Yes, Thunder Hole is considered family-friendly. The accessible walkways and the dramatic natural spectacle are engaging for all ages. However, due to the powerful waves and potential for slippery surfaces, children should be closely supervised, especially near the viewing platforms and ocean's edge.

    What is the policy for dogs at Thunder Hole and on nearby trails?

    Acadia National Park, including Thunder Hole and the Ocean Path, is generally dog-friendly. Dogs must be kept on a leash no longer than 6 feet (2 meters) at all times. Always remember to clean up after your pet to help keep the park beautiful for everyone.

    Are there any cafes, pubs, or accommodation options conveniently located near Thunder Hole?

    While there isn't immediate accommodation or a pub directly at Thunder Hole, a gift shop is located nearby. For cafes, pubs, and a wider range of accommodation options, the town of Bar Harbor is a short drive away and offers numerous choices to suit various preferences and budgets.

    What are the best viewpoints near Thunder Hole for photography or scenic appreciation?

    Beyond the main Thunder Hole viewing platforms, the surrounding Ocean Path offers numerous scenic overlooks. You can capture stunning panoramic views of the Atlantic coastline, including Otter Cliff, the distant Schoodic Peninsula, and Sand Beach. Exploring the path allows for diverse perspectives of the rugged coast.

    What are some interesting geological facts about Thunder Hole?

    Thunder Hole is a prime example of coastal erosion, shaped over thousands of years by the relentless action of ocean waves on granite. The land's post-glacial isostatic rebound also played a role in positioning this crevice to interact effectively with tidal forces. At low tide, you can observe the intricately carved cliff walls, revealing the geological history of the area.

    What wildlife might visitors spot near Thunder Hole?

    Visitors to Thunder Hole might have the opportunity to spot various marine wildlife. With a keen eye, you could see seals in the waters below. Seabirds are also common in the area, adding to the natural beauty of the coastal environment.

    Are there any hidden gems or less-known spots worth exploring near Thunder Hole?

    While Thunder Hole itself is a major attraction, the entire stretch of the Ocean Path offers many beautiful, less crowded spots. Consider exploring the tide pools at low tide for marine life, or venturing a bit further along the path towards Otter Cliff for different perspectives of the dramatic coastline. The beauty lies in the continuous rugged shoreline.

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