Tröllafoss – Iceland’s Hidden Waterfall Gem in the Capital Region
If you think Reykjavik’s urban charm is the only draw of Iceland’s Capital Region, think again. Just a short drive from the city lies Tröllafoss, a tranquil waterfall that feels like a secret whispered by the Icelandic landscape itself.
1. Introduction
Imagine stepping off the highway onto a moss‑covered path, the air tinged with the fresh scent of river water, and hearing the soft roar of a cascade before you even see it. That’s the moment you experience at Tröllafoss, one of the lesser‑known waterfalls that punctuate the dramatic terrain around Mosfellsbær. While Iceland’s Golden Circle and the mighty Seljalandsfoss dominate travel itineraries, Tröllafoss offers a quieter, more intimate encounter with nature—perfect for photographers, hikers, and anyone craving a slice of Icelandic serenity away from the crowds.
2. About Tröllafoss
- Location: Mosfellsbær, Capital Region, Iceland
- Coordinates: 64.210017 N, ‑21.534979 W
Tröllafoss (sometimes written as “Tröllafoss (Leirvogsá)”) sits along the Leirvogsá river, a modest watercourse that winds through the rolling hills south of Reykjavik. The waterfall’s name translates roughly to “Troll Falls,” a nod to Icelandic folklore that imagines trolls lurking behind misty cascades.
History & Significance
Unlike some of Iceland’s iconic waterfalls that have been featured in movies and TV series, Tröllafoss has remained relatively untouched by mass tourism. Its low profile has preserved the natural ambience that locals have enjoyed for generations. The falls are part of the broader Leirvogur valley system, which historically supported small farming communities and served as a natural corridor for wildlife.
While the exact height and altitude of Tröllafoss are not officially recorded, the waterfall’s modest size is compensated by its lush surroundings—sprouting birch trees, vibrant moss carpets, and a crystal‑clear pool at its base. The site is a favorite spot for locals to unwind, and it has slowly become a hidden treasure for adventurous travelers seeking authentic Icelandic experiences.
3. How to Get There
By Car
- Start in Reykjavik – Head east on Route 1 (the Ring Road) toward Mosfellsbær.
- Take the exit for Route 36 (Þingvallavegur) and follow signs for Mosfellsbær.
- Turn onto Þórshólmur Road (Road 48) – After about 5 km, look for a small, well‑marked turnoff leading to a gravel road that heads north toward the waterfall.
- Parking – A modest parking area sits at the trailhead; it’s free but can fill up during peak summer weekends, so arrive early.
The entire drive from Reykjavik’s city centre takes roughly 30‑40 minutes, making Tröllafoss an ideal half‑day excursion.
By Public Transport
Public buses to Mosfellsbær run regularly from Reykjavik’s BSÍ bus terminal. From the town centre, you’ll need to arrange a local taxi or a rideshare to the trailhead, as the final stretch isn’t serviced by regular routes.
By Bike
For the ultra‑adventurous, the paved portion of Route 36 is bike‑friendly. Expect a moderate climb and be prepared for changing weather—rain and wind can appear suddenly in Iceland.
4. Best Time to Visit
| Season | What to Expect | Why It’s Ideal |
|---|---|---|
| Late Spring (May‑June) | Snow melt swells the river, creating a fuller cascade. Daylight stretches to 20 hours. | Photographers love the soft, golden light and the vibrant green moss. |
| Summer (July‑August) | Warmest temperatures (10‑15 °C) and fully accessible trails. | Ideal for picnics and longer hikes to nearby waterfalls. |
| Early Autumn (September) | Autumn colors begin to appear; fewer tourists. | The misty atmosphere adds drama to waterfall photos. |
| Winter (December‑February) | Snow‑covered landscape; the waterfall may freeze partially. | For those seeking a magical, icy scene—requires proper winter gear. |
Tip: Because Tröllafoss is less visited, you’ll often find it relatively quiet even during the peak summer months. However, always check the weather forecast—Icelandic weather changes fast, and safety comes first.
5. What to Expect
The Experience
As you approach the trailhead, a faint, soothing sound grows louder—water splashing over rocks. The path is short (about 300 m) and well‑maintained, winding through a meadow dotted with wildflowers in summer and low‑lying lichens year‑round. When you emerge, Tröllafoss greets you with a gentle curtain of water that tumbles over a smooth basalt ledge into a clear, turquoise pool.
The waterfall isn’t massive, but its charm lies in the intimate setting:
- Moss‑Laden Rocks: The surrounding basalt is cloaked in bright green moss, creating a vivid contrast against the water’s blue tones.
- Birdsong: Early mornings bring the melodic calls of Arctic terns and meadow pipits.
- Photography Opportunities: The pool’s reflective surface, framed by moss and occasional rainbow mist, makes for stunning long‑exposure shots.
You can sit on a nearby rock, dip your feet into the chilly pool (if the water’s not too cold), or simply enjoy a quiet moment away from the city’s hum.
6. Nearby Attractions
Tröllafoss sits in a cluster of waterfalls that are perfect for a waterfall‑hopping day trip. Below are the closest cascades, each offering its own character:
| Waterfall | Distance from Tröllafoss | Highlights |
|---|---|---|
| Helgufoss | 3.9 km | A picturesque drop over a narrow gorge, often framed by rainbow arches. |
| Kollafjarðarárfoss | 7.1 km | A multi‑tiered cascade surrounded by birch woods; great for short hikes. |
| Flekkudalsfossar | 7.7 km | A series of small falls that create a soothing soundscape—ideal for meditation. |
| Tungufoss | 7.8 km | Known for its powerful flow during spring melt; a dramatic contrast to Tröllafoss. |
| Álafoss | 8.3 km | A historic mill site where the waterfall powered local industry; offers cultural insight. |
Suggested itinerary: Start at Tröllafoss in the morning, then drive east to Helgufoss for a quick photo stop. Continue north to Kollafjarðarárfoss for a light hike, and finish the day with a sunset view at Álafoss. This loop can be completed comfortably within a full day, allowing plenty of time for picnics and photography.
7. Travel Tips
- Dress in layers: Even in summer, Icelandic weather can be cool and windy. A waterproof outer layer, insulated mid‑layer, and moisture‑wicking base are ideal.
- Footwear: Sturdy, waterproof hiking boots with good grip are essential, especially on wet rocks near the waterfall.
- Timing: Arrive early (before 9 am) during summer to beat any small crowds and capture the soft morning light.
- Respect the environment: Stay on marked paths, avoid stepping on delicate moss, and pack out all trash. Iceland’s ecosystems are fragile.
- Safety: The rocks around the pool can be slippery. Keep a safe distance from the edge, especially after rain when the water flow increases.
- Photography gear: A tripod and neutral density filter will help you capture silky water effects. A wide‑angle lens works well for the surrounding landscape.
- Food & Drink: There are no cafés at the waterfall, so bring a packed lunch and plenty of water. Mosfellsbær town (10 km away) offers several cafés if you prefer a sit‑down meal.
- Mobile coverage: Cellular signal can be spotty near the falls. Download offline maps (e.g., Google Maps or Maps.me) before you set out.
Final Thought
Tröllafoss may not have the towering height of Gullfoss or the dramatic plunge of Dettifoss, but its quiet allure captures the heart of Icelandic nature—raw, unpretentious, and profoundly beautiful. Whether you’re a seasoned traveler mapping the waterfalls of the Capital Region or a first‑time visitor looking for a peaceful retreat near Reykjavik, Tröllafoss promises a memorable encounter with the land of fire and ice.
Pack your camera, lace up your boots, and let the whisper of Tröllafoss guide you into Iceland’s hidden wilderness.
