could this be a bear track....

Probably not.

That one track is heavy and fast tho. How soft was the soil when you found it?
A bear moving fast like that would leave a pad mark.

What did the rest of the stride look like?

I'd more say big cat or more likely a dog.

What ever it was was packing at least one long claw tho...

Claw length looks like black bear the more I look at it..

To bad that leaf is over the top of the print.