Yes, but Kepler Cascades is the first place where the Firehole River runs
beside the main park road, so it will be easy for us to sample it there.
Also, it makes sense that the road could be the source of pollution. Prior
to this point, human access to the river is limited.
What do you think, Doc?
I think Maya is right. If we find a serious problem even there, we can
always return and hike upstream. Also, I suggest our second sample site
should be the Upper Geyer Basin—home to Old Faithful.