Lyme disease cannot be contracted in Idaho.
According to the Idaho Department of Health and Welfare:
We often hear about Lyme disease in the national media, but cases in Idaho are rare and mostly occur in people who traveled to other areas of the country where infected ticks have been found.
The tick that carries Lyme disease is not known to live in Idaho, but since cases are tracked by where a person lives rather than where they were infected, Idaho will have some cases over the years, usually in people returning from trips in the eastern or midwestern U.S.
Resources
Idaho Statesman: Idaho is home to plenty of ticks but no Lyme disease, experts say — at least for now
Mosquito and tick prevention: How to avoid getting bitten
ALDF: Does Lyme disease occur in every State in the continental United States?