No, but it's about a twenty minute drive up on I-35 and actually it is only two blocks from the I-35 access Rd
It's not walking distance. But you will be near the Frío Street entrance to the river walk. Google maps can show you how close you really are. San Antonio is a small big city. You will find out you are really close to a lot of the attractions.
You should avoid eating on the Riverwalk unless you want chain food
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