Best natural monuments around Area C (Arrowsmith-Benson) offer diverse natural landscapes, from ancient forests to unique geological formations. This region, part of the Regional District of Nanaimo, British Columbia, features a variety of natural sites. Visitors can explore more than 8 natural monuments, each providing distinct experiences within its varied terrain. The area is characterized by its significant natural beauty and opportunities for outdoor exploration.
Last updated: August 18, 2026
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Popular around Area C (Arrowsmith-Benson)
Hole-in-the-Wall is a small but unique natural waterfall. The waterfall gets its name from a literal hole in the wall, creating a “keyhole” effect that’s especially exciting after rain or during spring runoff. Mossy rock walls, ferns, and dense coastal forest surround this waterfall.
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The largest tree in MacMillan Park, "The Big Tree" - a Douglas fir, stands in the Cathedral Grove south of the road. Its name comes from the botanist David Douglas, who identified more than 200 new plant species in the early 19th century, including the Douglas fir. (May 19, 2025)
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A short drive from Port Alberni lies MacMillan Park, directly off Highway 4. The park features the Cathedral Grove, a stand of giant Douglas firs; some trees are over 800 years old. North of the road are ancient Western Red Cedar trees. A severe storm in late 1997 severely damaged the stand. (May 19, 2025) https://bcparks.ca/macmillan-park/
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located in MacMillan Provincial Park at the West end of Cameron Lake, Cathedral Grove is the only highway accessible stand of ancient Douglas Fir forest on Vancouver Island.
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I didn't see the old car. Maybe it's no longer there. But the hike is worth it. Don't forget your hiking poles if you're not quite so young.
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Area C (Arrowsmith-Benson) offers several distinctive natural monuments. You can explore Hole-in-the-Wall, a unique waterfall with a 'keyhole' effect, especially striking after rain. Another must-see is Ammonite Falls, where you can observe visible layers of sedimentary rock with small fossils. For ancient forests, visit Cathedral Trail, MacMillan Park, known for its very old, towering trees.
Yes, several natural monuments in Area C are suitable for families. Cathedral Trail, MacMillan Park offers a beautiful forest experience with ancient trees, which is enjoyable for all ages. The Big Tree (Douglas-fir), MacMillan Provincial Park also features enchanting paths and towering trees, perfect for a family stroll. Additionally, Saysutshun (Newcastle Island Marine) Provincial Park provides beautiful paths, beaches, and a small cafe, making it a great family outing.
The natural monuments in Area C (Arrowsmith-Benson) are home to diverse wildlife. At Mount Benson Regional Park, you might encounter Whiskey Jacks, which are known to be quite friendly. Mount Arrowsmith Massif Regional Park is particularly rich in wildlife, with sightings of white-tailed ptarmigan on high ridges, and historically, Vancouver Island marmots. Cougars, black bears, wolves, and elk also roam the slopes and valleys of the massif.
There are numerous hiking opportunities near the natural monuments. For easy hikes, consider the routes around Ammonite Falls, such as the Ammonite Falls loop from Creekside Community Park. For more challenging trails, Mount Benson Regional Park offers an 8 km loop trail to its summit with stunning panoramic views. Mount Arrowsmith Massif Regional Park also features a network of long-standing alpine trails for intermediate and experienced hikers.
The best time to visit depends on your preferred activity. Late spring and early summer are ideal for Mount Arrowsmith Massif Regional Park, as the alpine meadows are vibrant with wildflowers. Waterfalls like Hole-in-the-Wall and Ammonite Falls are particularly impressive after rain or during spring runoff. Generally, clear days offer the best panoramic views from mountain summits like Mount Benson.
While many trails in the region involve rugged terrain, recent upgrades at Ammonite Falls include a large viewing platform and staircase, improving accessibility to the falls. For general accessibility, it's recommended to check specific trail conditions and park information before visiting, as some areas may have steep sections or uneven paths.
Many natural areas in British Columbia are dog-friendly, but specific rules vary by park and monument. It's always best to check the regulations for each specific location, such as Mount Benson Regional Park or MacMillan Provincial Park, regarding leash requirements and restricted areas to ensure a pleasant visit for everyone.
The region is rich in geological interest. At Ammonite Falls, you can see visible layers of sedimentary rock containing small fossils, including ammonites. Hole-in-the-Wall showcases a unique waterfall formation where water has carved a 'keyhole' through a shale wall. The rugged, mountainous terrain of Mount Benson and Mount Arrowsmith also presents impressive rock formations and diverse ecological zones.
Beyond hiking, the Area C (Arrowsmith-Benson) region offers various outdoor activities. You can find numerous running trails, including loops around Westwood Lake and Witchcraft Lake. For mountain biking enthusiasts, there are several MTB trails, such as the Forest Path loop from Benson Creek. Saysutshun (Newcastle Island Marine) Provincial Park also offers opportunities for exploring beaches and coastal trails.
Visitors frequently praise the breathtaking scenery and unique natural features. The expansive 360-degree panoramic views from the summit of Mount Benson are a major draw. Many appreciate the tranquil forest settings, especially the ancient trees along Cathedral Trail and The Big Tree. The distinctive geological formations like Hole-in-the-Wall and the fossil-rich Ammonite Falls are also highly regarded for their unique appeal.
When visiting waterfalls like Ammonite Falls or Hole-in-the-Wall, it's best to go in the late morning or early afternoon, especially during the week, to avoid crowds. The falls are most spectacular after rain or during spring runoff. Be aware that some sections of the trails, particularly to Ammonite Falls, can be steep, and ropes are in place to assist hikers. Always wear appropriate footwear for potentially slippery or uneven terrain.
Given the varied terrain and weather conditions, it's advisable to wear layers of clothing. Sturdy hiking boots with good grip are essential, especially for trails with steep or uneven sections, such as those leading to Mount Benson's summit or Ammonite Falls. Bringing rain gear is also recommended, as weather can change quickly, particularly in mountainous and coastal environments.


Extend your search for the best caves by checking out these guides of the top ones around Area C (Arrowsmith-Benson):