This is the side of the climb I have probably done most often, and also quite a few times just up to the car park, about 1/2 way. It’s about 2.5 miles for the full climb. The car park is pretty much the finish of the Glasgow Green Cycle Club hill climb course; going for the full climb, for me, requires holding back a little to the car park as the steepest parts of the second half of the full climb are just after the car park, and after a short relief, again just after that. It flattens nearer the top (the whole hill is pretty much convex like an upturned pudding bowl) and I can spin up a 69″ gear quite nicely. Eminently do-able on my 46/18 fixed and single speed (69″), and also 46/17 73″). I chose 54″ for the last hill climb event (which turned out to be too low, I think) and did it in 8:38 (approximately to the car park) and with 69″ my best is just on 10 minutes. i would think a 62″ or 66″ gear might be best for me. The full climb is a little over 20 minutes for me. The thing that makes this climb a little easier, given its maximum steepness, is that there are flatter sections here and there where I can get back in the saddle for a bit!