Various species (specifically the brown dog tick) are all along the west coast from California to British Columbia.
In this study it mentioned the Lone Star tick specifically though ("In the United States, the condition most often begins when a Lone Star tick bites someone"), and apparently it's not present in either of those states or Canada as far as I or the internet appears to know.
I guess it comes down to your risk aversion - assuming it can come from any tick, there's no 'safe' place to hike in most of North America. Personally I've been outdoors a lot all of my 35 years and ticks haven't been an issue here on Vancouver Island, British Columbia. The Pacific Northwest is probably safe enough.
As someone else mentioned, being outside and exercising is well worth the risk pretty much anywhere. Just be cognizant of the risk, check yourself and hiking partners if you're in a high risk area, etc.
