If you go the Baker route, Mountain Pass is along gradual hill. There aren't many other hills, if any, after that.
If you go the Tecopa way, it's a short but very brutal hill. There are a couple small hills to climb throughout the Old Spanish Trail Hwy & HWY 127.
Here's ours, we are the original owners and love it, this was in Idaho in August and this was yesterday getting loaded up for Holloween, I'll be looking for some good rides.
Another update:
In case you haven't noticed, we have a fancy new Dune Food section! The link is right under General Chat. I moved most of the recipes we had posted here on the forum over to the Dune Food page. It's a much nicer and easier to read recipe section. Check it out and add one if you have one.
http://www.dumontduneriders.com/dune-food/