In reply to the cassin ridge:
> • How warm is it? Will I be ok with a cheap synthetic bag for the valley and lightweight down bag for any bivis?
I went in early Jan last year. We got one frost at American Camp. Higher, i.e. around the base of the routes, lakes were partially frozen, as was the waterfall. Nice and warm in the day in the sunshine though.
> • How do you get from Nairobi – I assume this is the best place to fly to? – without hireling a car?
Taxi or matatu. The latter is much cheaper but also much riskier. We were lucky with drivers but some just don't care and are quite dangerous. We saw one matatu at the side of the road heavily bloodstained, windows smashed in and bodies littering the seats and the ground outside. This slowed down most of the drivers for all of 30 seconds before they were overtaking in the face of oncoming traffic again.
> • Are there wet or dry glaciers?
Dry.
> • I assume plastic will be far too warm? Will I be ok with Trango S boots or is a stiffer boot like the Trango Extreme a better bet?
I wore my Nepal Extremes which were unnecessarily heavy and rigid really. If you want to do an ice route or traverse between Nelion and Batian what you suggest would be sensible. If you just want to rock climb then a pair of Brashers with strap-on crampons for crossing the glacier would be sufficient.
> • Where is a good cheap place to stay? A tent? Or are there cheap bunkhouses/huts?
There are huts, but I don't think they're very conveniently placed. American Camp seemed well placed for us.
> • Is there any good rock climbing nearby?
These days there's ONLY rock climbing nearby. Rock quality varies between routes, from the second-scariest block I've ever dealt with to perfect solid granite. Mostly I experienced the latter.
> • I assume a set of nuts, a load of slings and krabs, plus a few Friend will be more than ample for most routes?
Depends on the grade of the route and your ability. But yes, a standard UK rock rack will get you up the popular routes no problem. For less well-travelled ones I'd be inclined to take pegs and a hammer. Up to you.
> • Can you get screw top gas? Or is a petrol stove a better bet?
We took petrol stoves. My partner had been before and didn't even consider the option of trying to buy canisters.
> • Are double ropes a good idea? I understand a lot of the routes have fixed abseil descents. Are they rigged for 50s or 60s?
Yes, double ropes are useful. Some descents are equipped, this can be ring bolts or just tat and old pegs. Rigged for 50s IME.
> • I got the impression that most routes are mainly rock. Will I be ok with a pair of crampons each and pair of light axes like BD venoms, split between two climbers, for most things?
You won't need tech axes. You might not want an axe on the glacier either -- we thought having them was unnecessary.
> • Can the climbing on most routes be done up and down in a day?
Yes, the mountains aren't huge. Nelion has quite a nice bivi hut which could allow you to do harder and more time-consuming routes. This is what Ian Howell built it for.
> • Will I be warm enough in a pair of stretchy trousers, thermal top, thin fleece and wind shirt. With buffalo Mitts and a light duvet jacket as extras?
When I was there you would have been fine in those.
> • Is the weather stable? Or will I need waterproof clothing?
We had afternoon thunderstorms, or at least clag, the first few days and our tent got flooded out once. Then the dry season really set in and the weather was perfect. I don't know if this is typical.
> • Is it worth taking a pair of proper tools and half a dozen screws on the off chance that the Diamond Couloirs is in?
Our summer is the wet season on that side i.e. when it's most likely to be in. Some Swedes did it a few months before we were there but I think dry-tooling on the initial pitches is becoming de rigeur. If you really want to do it and can afford to lug the weight (or get an extra porter maybe) then I don't see why not. Success doesn't have to be assured or even likely for it to be worth taking the gear and having a go. Up to you.
> • Is there any other ice or mixed routes that require two axes?
A few; I think most are based around the DC area. Look at the guidebook.
> • Can you recommend a good map and guide book?
Ian Howell's is fine. There's another whose name escapes me and is also useful. I'd only be Googling for you so you'll have to act on your initiative from here on.
> Any other tips and hints would be gratefully received.
We took the short route to and from the mountain, which was nice and we saw some good animals. However, it is apparently the least picturesque route and when I go again I'll take one of the longer paths and enjoy that part more. You could even look at the cost of having a cook in your party who'll stay with you the whole time and serve fried eggs and chapatis when you get down. Being masochistic skinflint misanthropes we took two porters for the carry in and thereafter did our own thing, including the carry out which is the way we like it. It could have been a bit less painful and we would have eaten better but we would probably have been pissed off all the time (we also wouldn't have had the flexibilty to pay a ranger £20 to drive us from the Met Station all the way to a bus stop in Nanuki). Depends what you like.