This round is also popular with bikers, given that the three elements of the route are all official bridleways.
If done clockwise, the first part is a normal ascent of Snowdon on the Llanberis Path.
The second part is a descent on the Snowdon Ranger Path to within nearly a mile of the bottom of this path, where a signed path leads off through Bwlch Maesgwm.
The last part is along Maesgwm, a good route colloquially known to some as Telegraph Valley (there used to be telegraph poles along this route).
The Maesgwm turning on the Snowdon Ranger Path
The round as shown below (which excludes the tarmac sections out of Llanberis at both ends) measures 10½ miles. From Llanberis itself, this will be a 12-mile round.
The second map below shows a detailed view of the bottom of the Llanberis and Maesgwm paths. Both join tarmac lanes from Llanberis. However, the Right of Way linking the two has recently been upgraded (shown by the red line), so that you can link right back to the bottom of the Llanberis Path.
The round can, of course, be undertaken in a reverse direction to that described.
Ordnance Survey data © Crown copyright and database right 2024
On the map below, the red dots indicate the bottom of the Llanberis Path and the Maesgwm Bridleways where they meet tarmacked lanes. The existing off-road Right of Way linking the two has been recently upgraded, and will enable you to end up where you started, though note that it is not a bridleway, so bikes are not permitted.
Ordnance Survey data © Crown copyright and database right 2024