Marchlyn Mawr Dam Road: A Scenic Journey Through Wales' Heartland

Marchlyn Mawr Dam Road: A Scenic Journey Through Wales' Heartland

Wales, europe

Length

5.31 km

Elevation

643 m

Difficulty

hard

Best Season

Year-round

Okay, picture this: You're in Wales, exploring Snowdonia's stunning mountains, and you stumble upon this crazy little road leading up to Marchlyn Mawr Dam. This ain't your average Sunday drive, folks!

We're talking about a completely paved but seriously narrow ribbon of tarmac that climbs up to 643m (2,109ft) above sea level. It's one of the highest roads you'll find in Wales! Built back in the late '70s, this 5.31km (3.3 miles) climb from Deiniolen is no joke. It's got some seriously steep sections, with gradients hitting a whopping 12.6% in places – your legs will definitely feel it if you're cycling!

Starting at the foot of Elidir Fawr, you gain a massive 426 meters in elevation, averaging around 8%, as you wind your way up. Heads up, though: this road is owned by the local power company, and while cyclists are welcome to grind their gears all the way up, a gate keeps cars from reaching the top, with the final 2.89km (1.8 miles) being off-limits to private vehicles. But honestly, the views are worth the effort. Just plan ahead!

Where is it?

Marchlyn Mawr Dam Road: A Scenic Journey Through Wales' Heartland is located in Wales (europe). Coordinates: 53.5374, -2.0213

Share this road

Road Details

Country
Wales
Continent
europe
Length
5.31 km
Max Elevation
643 m
Difficulty
hard
Coordinates
53.5374, -2.0213

Related Roads in europe

Çirmaniman Yaylasıhard

Çirmaniman Yaylası

🇹🇷 Turkey

Okay, adventure seekers, buckle up for Çirmaniman Yaylası in Turkey's Black Sea region! This ain't your grandma's Sunday drive. We're talking serious elevation here – almost 10,000 feet! Located in Rize Province, getting to the summit is an adventure in itself. The gravel road is infamous for its crazy tight hairpin turns and bone-jarring bumps. We're talking 4x4 territory, folks. Seriously. And if heights make you queasy, maybe sit this one out. Plus, Mother Nature throws curveballs. Expect steep climbs, and after even a sprinkle of rain, things can get dicey with loose gravel. Winter brings heavy snowfall, so the road can close without warning. But the scenery? Absolutely breathtaking. Just be prepared!

Lazaunhutte Refugehard

Lazaunhutte Refuge

🇮🇹 Italy

Okay, buckle up, adventure seekers! We're heading to Rifugio Lazaunhutte, a crazy-cool mountain refuge perched way up at 2,425 meters (that's 7,956 feet!) in the Italian Alps of South Tyrol. This place is nestled in the Ortler Range, specifically within the stunning Senales Valley. Now, getting there is half the fun, and by "fun," I mean a proper off-road challenge. The road is all gravel, rocks, and bumps, so prepare for a wild ride. It's super narrow with hairpin turns that'll make you sweat, but the views are totally worth it! Heads up, though: this route is usually snowed in from September to June, so plan your trip accordingly. Basically, come prepared for an unforgettable alpine experience!

The completely deserted road to Col de Chaudehard

The completely deserted road to Col de Chaude

🇨🇭 Switzerland

# Col de Chaude: A Steep Swiss Mountain Adventure Ready for a serious leg workout? Col de Chaude (also called Col de Chaudoz) sits pretty at 1,600m (5,300ft) in Vaud canton, Switzerland, near Aigle. Fair warning: 11 out of the 13 km climb maintains an average gradient above 10%—this isn't your typical scenic cruise. The adventure kicks off in Villeneuve on the shores of Lake Léman at just 357m elevation, which means you've got serious vertical to tackle. The mountain road here is delightfully narrow and wonderfully quiet (in the best way), with stretches hitting over 15% gradient that'll have your calves screaming. It's the kind of road that makes you feel genuinely remote from civilization. The full push from Villeneuve covers 12.8 km with a whopping 1,243m elevation gain. Work that out and you're looking at an average grade of 9.7%—basically relentless. The payoff? A charming restaurant waiting at the summit, perfect for celebrating your conquest with local fare and views that stretch for miles. This isn't a casual mountain pass—it's properly steep, genuinely isolated, and absolutely rewarding for those ready to put in the effort.

Where is the Road F578 in Iceland?extreme

Where is the Road F578 in Iceland?

🇮🇸 Iceland

Okay, buckle up adventure junkies, because F578, aka Arnarvatnsvegur, is NOT your average Sunday drive! This "road" (and I use that term loosely) claws its way through the Western Highlands of Iceland, north of the mighty Langjökull glacier. Think you're prepared? Think again. You're gonna need a serious 4x4 with high clearance to even think about tackling this 79km (49 mile) beast that stretches between Road 704 (Miðfjarðarvegur) and Road 518 (Hálsasveitarvegur). We're talking bone-jarring potholes, ruthless ruts, and boulder fields that'll test your off-roading skills to the absolute limit. And remember that bumpy ford on Norðlingafljót? Yeah, it's still there, and it's waiting for you. The northern stretch near Arnarvatn large can be rocky and wet, with treacherous mud holes ready to swallow your tires whole. It's so remote that some rental car companies outright ban this road, even for 4x4s. Consider travelling with a buddy for safety. But the payoff? Epic. This track winds through stunning lava fields on its way up to 589m (1,932ft) above sea level. F578 is famous for giving you access to many fishing lakes that are mainly located in the middle of the route. The biggest of them is called Arnarvatn Stóra. Just remember, this road is only open during the summer, usually from late June to early September. And keep an eye on the weather – rain and warm temps can turn those streams into raging rivers in a heartbeat. Glacial rivers swell as the day goes on. Are you brave enough to take on the challenge?