SS MTB Gearing

I decided to take on the 17 mile Snake MTB TT next weekend and have been ruminating over gearing options. My cranks are 110 BDR which limits them to the smallest chain ring size of 34 teeth. Here are the options with what I have...

The best option I think will be the 34x20 which I had to special order. That gives me a 1:1.7 ratio and will have to get me up those hills. I use a 36x18 most of the time but not on those hills.


I am up for the challenge but I think it is supposed to rain so that will be interesting.