Yep, agree, Cyberjaws. Its actually 3 small hills with 2 downhill bits, and its about 1.10 mile long all in.
Bearbrook is at Weston Turville, about 3 miles south of Aylesbury, Mattress. Im doing Wycombe 10k, and that Dawes hill is a real bitch! The Half also has the hill, but then the similar downhill bit at about mile 6-7 ish. I find the second half of Wycombe Half a bit boring, you go a long quite a busy road with a lot of parked cars.
If you are thinking of a quieter Half, try the Burnham Beeches, thats 2 laps of fairly undulating road, with all roads closed (or the bulk of them at least). Its a good summer Half as its mainly under trees and is shaded. (Sorry, apppreciate the thread is 10k, just putting penny worth in). And as its two lap, you can just do one lap, and pull off at 6 miles.... its a bit expensive for just 10k, but that is my Plan B for this years event.