Highlight • Trail
Cycling
5.0
(23)
Gravel riding
5.0
(1)
The Old Cannon Road, nestled within the Mustavuori-Porvarinlahti Nature Reserve in Helsinki, Finland, offers a unique blend of historical significance and natural beauty. This trail, part of the larger Mustavuori-Porvarinlahti area in the Vuosaari district, is renowned for its well-preserved World War I fortifications and diverse ecosystems. While the specific highlight point sits at an elevation of 8 metres, the surrounding reserve features varied terrain, including elevated rock formations, deep gorges, and extensive forests, making it a fascinating destination for exploration.
Visitors consistently praise the captivating combination of military history and tranquil nature found along the Old Cannon Road. The opportunity to explore trenches, bunkers, and excavated caves from the First World War, alongside the unique paved cannon roads themselves, provides a compelling historical immersion. Many are also drawn to the area's rich biodiversity, particularly the herb-rich forests and the vibrant spring blooms, offering a peaceful escape from urban life.
Before embarking on your journey along the Old Cannon Road, it's advisable to wear sturdy footwear suitable for varied terrain, as the paths include both cobblestone sections and potentially rocky, narrow trails. The Mustavuori-Porvarinlahti area is easily accessible, reachable by car with available parking, or via public transport with buses serving the vicinity from Itäkeskus. While some parts of the official trails are accessible, even for wheelchairs and strollers, be prepared for more challenging sections if you plan to explore deeper into the fortifications.
The Mustavuori-Porvarinlahti Nature Reserve is a year-round destination, with each season offering a distinct experience. Spring brings a spectacular display of wildflowers, while autumn showcases vibrant foliage. The area is popular for hiking, jogging, and nature walks, with opportunities for birdwatching among the diverse wildlife. In winter, when conditions allow, the trails transform into routes for cross-country skiing, providing a serene experience amidst the snow-covered landscape.
The Old Cannon Road itself is a historical gravel road, forming a key part of the trail network within the Mustavuori-Porvarinlahti Nature Reserve. This intermediate trail offers a chance to walk directly on the original paved military roads constructed over a century ago. Its gentle elevation changes make it suitable for a wide range of visitors looking to combine a historical walk with a refreshing outdoor experience.
Exploring the Old Cannon Road offers many memorable moments, from discovering hidden bunkers and tunnels to marveling at the unique geological formations like the "devil's fields." Hikers often recount the serene atmosphere of the ancient forests and the thrill of uncovering remnants of a bygone era. The sight of the cobblestone cannon road winding through the dense woods truly transports you back in time, providing a tangible link to Finland's past.
To fully experience the historical and natural wonders of this area, explore the various routes available around the Old Cannon Road, Mustavuori-Porvarinlahti. Whether you're interested in a leisurely stroll through the forest, a more challenging hike to explore the fortifications, or a family-friendly outing, komoot offers numerous options to plan your adventure. Discover trails that lead to scenic viewpoints, through the herb-rich forests, and past the fascinating WWI structures, ensuring a rewarding visit for all.
This Highlight is in a protected area
Please check local regulations for:
Mustavuori-Porvarinlahti
Tips
September 21, 2021
Cycling

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Details
Informations
Elevation 10 m
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Friday 12 June
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Max wind speed: 15.0 km/h
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The Old Cannon Road itself is a historical cobblestone and gravel road, offering a relatively even surface. However, the broader Mustavuori-Porvarinlahti Nature Reserve features varied terrain, including rocky sections, narrow trails, and elevated rock formations. You'll encounter mixed forests, gorges, and areas with extensive piles of rounded stones known as "devil's fields." Sturdy footwear is recommended, especially if you plan to explore beyond the main cannon road.
Absolutely! The area is rich in both historical and natural sights. You can explore well-preserved World War I fortifications, including trenches, bunkers, and excavated caves. Don't miss the 30-meter-long tunnel and the breathtakingly narrow, seven-meter-deep gorge. Naturally, the Mustavuori area is Helsinki's most valuable herb-rich forest, boasting diverse flora, especially vibrant spring blooms, and unique geological formations like the "devil's fields" (post-glacial raised beaches).
The Mustavuori-Porvarinlahti area is easily accessible by public transport. Buses from Itäkeskus serve the vicinity, providing convenient access to the trailheads. It's advisable to check local Helsinki public transport schedules for the most up-to-date routes and stops.
Yes, the area is reachable by car, and parking options are available. However, specific details on parking lot sizes or potential fees are not provided. It's generally a good idea to arrive early, especially on weekends or during peak seasons, to secure a spot.
Yes, the Mustavuori-Porvarinlahti Nature Reserve is a year-round destination. In winter, when conditions allow, the trails transform and can be used for cross-country skiing, offering a serene experience in a snow-covered landscape. Be prepared for potentially icy or snowy conditions on the cobblestone road and other trails, and dress appropriately for cold weather.
While the research doesn't explicitly state dog-friendly policies, most nature reserves in Finland allow dogs on a leash. It's always best practice to keep your dog on a leash to protect the diverse wildlife and flora, especially in a Natura 2000 area like Mustavuori-Porvarinlahti. Please ensure you clean up after your pet.
No specific permit requirements are mentioned for general hiking or visiting the Mustavuori-Porvarinlahti Nature Reserve. As a public nature reserve and ancient monument site, it is generally open for visitors to explore responsibly. However, certain activities like camping or lighting fires might be restricted, so always observe local signage.
The Old Cannon Road itself is part of a larger network of trails. While the exact length of the Old Cannon Road segment isn't specified, the overall area offers various routes. A leisurely exploration of the main cannon road and some nearby fortifications could take anywhere from 1 to 2 hours, depending on your pace and how much you stop to explore the historical sites and natural features.
Yes, parts of the official trails within the Mustavuori-Porvarinlahti area are noted as accessible, even for wheelchairs and strollers. This allows a wider range of visitors to enjoy the area. However, be aware that deeper exploration into the fortifications or off the main paths may involve more challenging, rocky, or narrow sections.
The reserve supports a rich variety of wildlife, particularly bird species. Birdwatchers might spot wood warblers, icterine warblers, Eurasian blackcaps, red-breasted flycatchers, hazel grouse, and black grouse. The virgin forests with decaying wood also host rare polypore species, indicating a healthy and diverse ecosystem.
The Mustavuori-Porvarinlahti area is located within the Vuosaari district of Helsinki. While the immediate vicinity of the trail is a nature reserve, you can find various amenities, including cafes, restaurants, and potentially accommodation, within the broader Vuosaari district or by traveling a short distance to other parts of eastern Helsinki.