Msg U-1: You need to be logged in for this link to work.
Links on the Unclimbed Peaks list just go to this 'unknown browse' page if you are not logged in.
This is a means of preventing robots from getting large lists of URL's to follow.
The list only has working links for users who are logged in.
To login, create a free login, then convert it to a paid login.
If you already created a login in the past, search for your password here.
You don't need to be logged in to search for individual mountains using the text search on the front page. But to click thru from the lists, you must be logged in.