What is the best length of time to backpack across Europe?

Probably the best length of time to backpack across Europe would be around a month or so. In general, 4 to 6 weeks should be plenty of time to get around Europe and see various places for the first time. After 6 weeks, you'll probably be worn out and want a rest from all the travel. Remember, you can always go back and visit places that you may have missed or didn't have the money for.

I backpacked through Paris, Bordeaux, Barcelona and Madrid in 2 weeks. I felt like this was a good amount of time, but if I wanted to see any more cities I would say a month is a good time span to see more. You do get worn out though for sure. So if you're going to be there a month, just pace yourself and take it easy.

This was my first time backpacking in Europe and I ended up learning a lot, so I started a site to help first time backpackers know what to pack, what to expect, and things to see and avoid in the cities I stopped in. Maybe it could help you out if this is your first trip. Check it out. http://www.squidoo.com/firsteuropetrip

Have fun!