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Mountain biking trails

Gem Bridge – Grenofen Tunnel loop from Tavistock

Routes

Mountain biking trails

Gem Bridge – Grenofen Tunnel loop from Tavistock

Moderate

4.3

(3)

riders

Gem Bridge – Grenofen Tunnel loop from Tavistock

02:07

25.1km

440m

Mountain biking

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: March 19, 2026

Tips

Cycling is not permitted along parts of this route

After 319 m for 110 m

After 17.8 km for 156 m

After 24.7 km for 110 m

Waypoints

Start point

Bus stop

Get Directions

3.28 km

Grenofen Tunnel on Drake's Trail

Highlight (Segment) • Trail

A network of 21 miles (33 km) cycling and hiking paths, Drake's Trail leads from Tavistock to Plymouth. The Trail passes through quaint countryside, river valleys, peaceful woodland, and vast open moorland. The historic route also includes iconic engineering feats like the Grenofen Tunnel and Gem Bridge. A traffic-free trail, the path is suitable for most types of bikes, although some sections are gravel and slippery in the rain.

Tip by

5.58 km

Gem Bridge

Highlight • Bridge

Gem Bridge towers 78 feet (24 m) above the River Walkham, affording wonderful views over the valley below. Until 1965, the original Walkham Viaduct would have stood here. Designed by Isambard Kingdom Brunel, it was demolished after the closure of the railway.

It's a wonderful experience to cycle over the bridge, especially in autumn when the trees are painted red.

Tip by

5.66 km

Drake's Trail: Magpie Viaduct and Bluebell Woods

Highlight (Segment) • Trail

This is an exciting section of the glorious 21-mile Drake's Trail cycling path that runs through Dartmoor.

You will pass through enchanting forestry featuring seasonal bluebells and over Magpie Viaduct, where you'll be afforded some wonderful birds-eye views of the surrounding landscape.

Tip by

12.3 km

Magpie Viaduct

Highlight • Bridge

Magpie Viaduct was designed by Brunel and originally built in 1859 from granite and timber, then rebuilt in 1902 in Staffordshire brick.

From here you can also enjoy a raised vantage point for views over Dartmoor.

Tip by

16.5 km

Double Waters River Crossing

Highlight • River

The River Tavy and the River Walkham meet here at Double Waters.

This peaceful, woodland setting is popular with wild swimmers.

Tip by

16.5 km

Double Waters — Confluence of the Rivers Walkham and Tavy

Highlight • Viewpoint

An enchanting spot on the edge of Dartmoor, the meeting point of these two rivers is great for wild swimming and having a picnic. Mossy rocks, gnarled trees and exceptionally clear water make the confluence quintessentially Dartmoor. While not particularly long rivers, both have their sources in the national park.

If you do swim here, be very mindful of both the current and the temperature, which is always cold and can be quite shocking when the air in warm.

Tip by

20.4 km

Grenofen Tunnel

Highlight • Structure

Part of the Drake’s Trail and the Dartmoor Way, this 374-yard (341 m) tunnel was built by Brunel in the mid-1850s for the South Devon & Tavistock Railway. After the line closed, it sat abandoned for decades before being resurfaced and opened as a foot and cycle path.

The tunnel is lit and is a fun addition to an already amazing route. It has a tendency to drip on the heads of those who use it though!

Tip by

20.8 km

Grenofen Tunnel

Highlight • Structure

Great walk, the footpath from the top of brook lane/Rix hill is not well used, just follow the hedgeline!

Tip by

25.1 km

End point

Bus stop

Way Types & Surfaces

Way Types

9.54 km

8.45 km

4.21 km

2.11 km

691 m

< 100 m

Surfaces

9.80 km

7.90 km

3.55 km

2.96 km

473 m

404 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (190 m)

Lowest point (40 m)

Weather

Tuesday 26 May

26°C

16°C

23 %

Additional weather tips

Max wind speed: 25.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Gem Bridge – Grenofen Tunnel loop from Tavistock

Grenofen Tunnel on Drake's Trail

Gem Bridge

Drake's Trail: Magpie Viaduct and Bluebell Woods

Magpie Viaduct

Double Waters River Crossing

Double Waters — Confluence of the Rivers Walkham and Tavy

Grenofen Tunnel

Grenofen Tunnel

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