In reply to Sean_J:
> (In reply to mikekeswick) I've been a lot of times, using a 60 and a 70. I'd recommend a 70 for general peace of mind when lowering off, plus when it wears out and need ends chopping you will still have a useable 60-ish m rope. Re. Lourdes, I think there is a note in the old (2000 or 2002?) guide that a 60m is JUST enough, even though it's 35m long it's so steep that you're OK on a 60. But i've lost that page in ym old guide so can't confirm myself.
From the guide. "Note that many of the routes are at least 30m in length and very steep. It is possible to reach the ground on Lourdes with a 60m rope, but it is a close thing and there's nowhere to go if you find you are a few metres too short. On the less steep routes keep in touch with the other rope as you lower."
I have only watched someone lower off that route once, and he was on a 60m rope. With stretch it was fine, but don't just do it because I said it worked for him.