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The Eyebrow Trail is considered challenging and strenuous. Hikers should expect a significant elevation gain of about 1,100 feet in just one mile. The terrain features numerous stone stairs, rock scrambles, and sections with assisted climbing aids like cable railings, metal bars, iron rungs, and even a ladder. There's also a stream crossing over an open slab of rock that can be particularly hazardous when wet or icy.

The trail is known for its unique assisted climbing sections, including cable railings, metal bars, iron rungs, and a ladder, which help hikers navigate steep rock faces. The most prominent natural feature is the 'eyebrow' cliff face itself, which gives the trail its name due to its curved rock grains. The trail culminates at a scenic overlook providing panoramic views down Grafton Notch and of the surrounding mountains.

The trailhead for the Eyebrow Trail is located off Route 26 within Grafton Notch State Park. There is a designated parking lot that also serves access to the Appalachian Trail and Table Rock trails. While there are no specific permit requirements for hiking the Eyebrow Trail itself, standard state park entrance fees or passes may apply for Grafton Notch State Park. It's advisable to check the official Maine State Parks website for current fee information.

Due to its steep, strenuous nature and assisted climbing sections, the Eyebrow Trail is generally not recommended for beginners or very young children. It requires a good level of physical fitness, comfort with heights, and experience with rugged terrain. Families with older, experienced, and adventurous children might find it rewarding, but it's crucial to assess individual capabilities.

While Grafton Notch State Park generally allows dogs on trails, the Eyebrow Trail's specific features—including ladders, iron rungs, and steep rock scrambles—make it extremely challenging, if not impossible, for most dogs. These assisted climbing sections would require dogs to be carried or lifted, which can be unsafe for both the animal and the hiker. It's best to consider other trails in the park if hiking with a dog.

Winter hiking on the Eyebrow Trail is highly challenging and potentially dangerous. The trail's steep sections, rock scrambles, and especially the stream crossing over an open slab of rock can become extremely icy. The assisted climbing features may also be covered in ice or snow, making them difficult and hazardous to use. Only experienced winter hikers with appropriate gear (microspikes, ice axe, proper winter clothing) should attempt this trail in winter conditions.

The Eyebrow Trail is often hiked as a loop by ascending the challenging Eyebrow Trail and descending via a section of the less steep Appalachian Trail. This loop typically ranges from approximately 2.2 to 2.7 miles. The time it takes can vary significantly based on a hiker's fitness level and comfort with the technical sections, but most hikers should plan for 2-4 hours to complete the loop.

Grafton Notch State Park is in a relatively remote area. For cafes, pubs, and accommodation, visitors typically look to nearby towns such as Bethel, Maine, which is a popular hub for outdoor enthusiasts. Bethel offers a range of dining options, lodging from inns to hotels, and other amenities. It's advisable to book accommodation in advance, especially during peak seasons.

Hikers should wear sturdy hiking boots with excellent grip, as the trail can be wet and slippery, especially on the rock slab stream crossing. Layered clothing is recommended, even in warmer months, due to elevation changes and exposure. Essential items include plenty of water, snacks, a map, a first-aid kit, and sun protection. Gloves can be helpful for gripping the cables and rungs.

Grafton Notch State Park is known for its rugged terrain and challenging hikes. While the Eyebrow Trail is unique with its specific assisted climbing features, other trails in the park, such as sections of the Appalachian Trail leading to Old Speck Mountain or Baldpate Mountain, offer similar strenuous climbs and rewarding views. These trails also involve significant elevation gain and rocky terrain, appealing to hikers seeking a challenge.