In Scotland, access to the countryside is governed by the Scottish Outdoor Access Code, arising from The Land Reform (Scotland) Act 2003. The Outdoor Access Code came into force on the 9th of February, 2005.
Your Responsibilities
Under the Scottish Outdoor Access Code, you have a number of responsibilities you must fulfil if you intend to access land. Those responsibilities are summarised here.
The Land Reform Act and the Code
If you require further detail on the Act or the Code, you will most likely find what you are looking for on the Scottish Natural Heritage website.
Safety
Take your own safety seriously. See here for safety advice.
Respect the Brochs
It is an offence to damage brochs or other listed monuments.