Skip to content


The Parallel Roads Earthcache

A cache by Ah! Send Message to Owner Message this owner
Hidden : 07/21/2009
1 out of 5
1 out of 5

Size: Size:   not chosen (not chosen)

Join now to view geocache location details. It's free!


How Geocaching Works

Related Web Page

Please note Use of services is subject to the terms and conditions in our disclaimer.

Geocache Description:

The cache is easy to reach on a single track road that runs into Glen Roy from Roy Bridge on the A86.
The co-ordinates take you to a parking area and view point with an information board.

Thanks to Fungimanforager who sent us the above related web page link.

The Parallel Roads represent the shorelines of ice-dammed lakes. Typically they are narrow benches (several metres wide) cut into the bedrock of the hillsides and in places covered by remnants of lake beach gravel. They extend along much of Glen Roy and Glen Gloy and parts of Glen Spean. Probably they formed through a combination of intense frost weathering and wave action along the lake shore zone. The control of lake levels by the different cols allowed the lakes to persist for sufficiently long periods such that even the hard, Precambrian bedrock was broken up and eroded.

An ice field developed to the west of Glen Roy and the Great Glen, with a further ice centre to the south, over Rannoch Moor. Glaciers flowed eastwards along the glens from the ice field in the Western Highlands. One tongue of ice blocked the entrance to Glen Gloy, while another extended eastwards to block lower Glen Roy. Here it met a glacier that had extended into the middle section of Glen Spean. The blocking of Glen Spean led to a lake being impounded. As the glacier advanced up lower Glen Roy, it cut off a lake in this valley and the rising water eventually found its way across a pass.

A further advance of the glacier up Glen Roy resulted in the blocking of this exit for the water, and the lake rose further, to drain across the low ground at the head of the Roy and Spey glens. A lake at a higher level impounded in Glen Gloy drained through the head of this glen across a pass into Glen Roy. As the ice retreated, the overflows were unblocked in the reverse order; finally the ice dam broke near Spean Bridge and the lake drained away under the glacier very suddenly and rapidly towards the Great Glen.

To claim this cache you must answer two questions and submit a photograph of yourself with your GPS and the earthcache feature in view.

Question 1. What are the heights in metres of the three “roads”?
Question 2. What is the name of the glacier which dammed Glen Roy?

E-mail the answers to us via our profile. If we do not receive the answers and/or a photograph is not posted, you may have your log deleted. Educational guidelines for Earthcaches are set by and (Earthcache) and have to be adhered to.

Additional Hints (No hints available.)

Reviewer notes

Use this space to describe your geocache location, container, and how it's hidden to your reviewer. If you've made changes, tell the reviewer what changes you made. The more they know, the easier it is for them to publish your geocache. This note will not be visible to the public when your geocache is published.