Kirstie said:
I remember that I did ColinJs hills in 2006...and tore a quadricep, which hurt.
Ouch!
I think I did something similar to my upper right thigh on the Kirklees Sportive this year. I didn't really notice on the day itself but the next day my leg was extremely tender and there was a horrible (and painful) 'twanging' sensation as I hobbled about. It only really started to feel better after about 5 months or so.
As for
my hills...

If any of you are crazy enough to come over to have a go at Mytholm Steeps and/or Scar Head, you might as well do some of the other nasties while you're at it!
Just opposite Mytholm Steeps is a tough little climb to the hamlet of Horsehold (to get to the foot of it, take the road over the canal by HB co-op) and climb up the narrow road to the right. It's a road-to-nowhere on a road bike, unless you ride the bridleways at the top with extreme caution (they are rutted and rocky so I'd recommend a MTB up there). The farms mark the end of the tough climb, but you can carry on up for another km or so to get the best views. I shouldn't have to say this, but -
treat the descent with total respect! If you don't you will hit crazy speeds very quickly. The road is narrow, and strewn with gravel and you do get 4x4s and farm vehicles coming up it.
There is another road-to-nowhere up behind HB railway station. If you cross the canal as described above but carry on round through Fairfield you will eventually come to a concrete road up through the woods. That goes up past a couple of houses and then turns into a very steep cobbled climb to the hamlet of Old Chamber. From there it would be just about possible to ride down the track on the right on a road bike, but your wheels wouldn't thank you. Best to just turn round and go back the way you came. Again - very tricky to descend.
NB - almost lethal in the wet - road bikes, and steep hills with wet, greasy cobbles are not a good mix!
There's a tough climb on the right just as you come into Todmorden from the direction of Hebden Bridge. Cross Stone Road is very steep to start with and then eases off a bit. There are two ways up to Staups Moor from there - straight up past the golf course is quite tough. I prefer to go right and eventually do the tougher climb to Great Rock.
Nearer Halifax... nip up to Luddenden village from Luddenden Foot. You can then tackle a nasty brute up towards Wainstalls/Mount Tabor. That has been used for the National Hill Climb championships. There are other even tougher variants nearby if you feel really masochistic.
Kirstie said:
At the weeked I did Oughtershaw bank from Kettlewell on a tourer which got me a bit hot under the collar too...
Oh, that's Fleet Moss by another name isn't it? I think that side is marginally easier than coming from Hawes, but yes, it's tough. I saw some riders tackle it on hand-cranked recumbents once - wow!