At the current time you must:
Muck is the smallest of the Small Isles, measuring less than 4km by 2km. It may lack the dramatic outline that makes neighbouring Eigg and Rum so unmistakable and is much less known and visited. However, Muck is a beautiful island in its own right, from its fertile fields and corncrakes, to its sandy beaches and its unexpectedly scenic western coastline, it has a great deal to offer the visitor on foot.
Whilst there are shorter, worthwhile walks for those having only a short stopover between ferries, it is well worth booking accommodation and planning an overnight stay here, taking the opportunity to enjoy the superb complete coastal walk. Whatever you do on Muck, don't forget to visit the cafe/ restaurant too!
Note that much of Muck is used for livestock and (if they must be taken) dogs should be kept under very tight control, and fields with lambs avoided completely.