teetosugars, that was probably me and my old man. it took us less than an hour and a half to get up to the summit. we only rode the bits that wouldnt have knackered us for the way down and we stopped for a sarnie 3/4 of the way up too. its a pretty gentle gradient other than the very start on the road, a section of steppy rocks just after half way, then another steep section just after you go under the railway for the last time. well worth it though.
we were pre-ban this time but last year we went mid-may, arrived at the start of the bridleway at 4:50 and met a ranger. he started to tell us off because it was before 5 but when i asked him if we were allowed to push our bikes up before 5 he said yes. we were grateful for the excuse.
even outside the ban ive never managed to blag my way on to the train though, try it very time!