Hi, I love mountain climbing
I do as well.  Last year I went on a 3 week backpacking trip through the Sierra Nevada in California.  Have you been on any trips recently?
No I have not. What did you like about the Sierra Nevada?
It's really cool being around all of that exposed rock.  We don't have peaks like that on the east coast where I'm from.
I hear that there are elevation contours that follow the length of the Sierra Nevada
Yup.  There are contours everywhere.  They just describe and show a change of elevation of a surrounding landscape.
Did you see any interesting plants and animals?
We saw a few bears.  That was probably the most interesting.  Have you ever seen one in the wild before?
No, was it a brown bear?
Black bear