Less hunting and different hunting (in Oregon, no dogs = inneffective to no cougar hunting) adds up to bolder cougars and perhaps (though I think it is subject to debate) bears. The end of cougar hunting here means they are not harassed (more often the case than getting killed by hunters) and so they do not learn to fear humans, nor to associate humans with dogs able to chase them and perhaps tree them. The law in Oregon was changed by a referendum that appealed to the soft hearted and those unfamiliar with hunting and wildlife management.
it will only change when more human remains are dragged out of the woods.
So learn what to do if stalked, and if you are lucky you will be ok. Juvenile cougars, in particular, are persistent,have a bit of a tendency to hunt with another cougar (perhaps a sibling?) and do not know enough to back off quickly.
If in a group, sit facing one another so you can cover each others' backs.
And keep small people and kids close to hand if you suspect you might be in cougar country.
This sounds paranoid, but it beats having a 140-180 pound cougar on your back.