Can I walk from a bart station?

Get off at Embarcadero BART and grab the T Train.

Yes, like the other mentioned; Exit Embarcadero and grab the T train or S shuttle train, just show your game ticket to the attendant and he/she will let you through. -OR- You can exit Montgomery and walk one block over to 3rd St for a straight shot to Chase, there are many restaurants and bars you can pre-game @ beforehand. New Belgium Brewing is also on 3rd St next to Parking Lot A

Yes it's about 2 miles but do-able

E scooters available in the area