Swiss Pass route Basel to Bern

Is swiss pass valid from basel to bern?

Yes it is, assuming you mean the Swiss Travel Pass.

Everything about this pass can be found on this page: www.myswissalps.com/sw isstravelpass. You'll notice there's also a section about where it's valid - you will find a downloadable map there which shows you exactly where your pass is valid, where you get discounts, etc.

Have a nice trip!