A location near Loch Cuithir in north east Skye appears in 47 Ronin albeit with a lot of CGI to add extra mountains behind the real ones. The real pointy mountain is Sgurr a' Mhadaidh Ruaidh part of the Trottenish Ridge.

A road leads off near the parking for the Lealt Waterfall next to the A855 to Lealt from where a track runs a couple of miles to Loch Cuilthir. The loch was used in the past for Diatomite extraction and even had it's own railway at one time to take the mineral away. See this article in the Stornaway Gazette for information on the history of the area..

The location in the Google Earth location file is only approximate but seems to line up with the landscape features using it's ground level view. I'm presuming either the old railway or the access track was used for the horsemen to ride along.

The photograph below is on almost the same line of sight but taken a couple of miles further away near Marishader.