For how long is a bobcat pregnant?
“Gestation lasts about sixty-three days”.Wild Cats of the World by Mel and Fiona Sunquist.
The average litter sizes range from 2.5 to 3.9 kittens. Litters as large as six have been recorded. Young females have smaller litters than older females.
Source: Wild Cats of the World
The website urban carnivores.com says that the gestation period lasts 60 days.
Wikipedia states that gestation lasts about two months. This equates to 30.42 x 2 = 61 days rounded up.
Conserve Wildlife Foundation of New Jersey says gestation is approximately 60 days.
Of these sources I’d rely more on the first.