Welcome to the Jalopnik Weekend Motorsports Roundup, where we let you know what's going on in the world of racing, where you can see it, and talk about it all in one convenient place. Where else would you want to spend your weekend?

We're now into March, and that means that the 2013 racing season is finally in full effect. Woo hoo! Those winter dead months were the worst.

This weekend, we have some really great racing on tap. There's NASCAR in Phoenix, Grand-Am in Austin, and Australian V8 Supercars in... um, Australia. That's not on American TV, but it is .

As always, let us know about anything we missed, or about good livestreams out there, in the comments.

All times Eastern.

Speedworld Off Road Park

Surprise, Arizona

(Race from May 18)

4 a.m. on SPEED

Pomona, California

(Race from Feb. 14-17)

8 a.m. on ESPN2

Circuit of the Americas

Austin, Texas

11 a.m. live on

Phoenix International Raceway

Avondale, Arizona

12 p.m. on SPEED

Phoenix International Raceway

Avondale, Arizona

1 p.m. on SPEED

Phoenix International Raceway

Avondale, Arizona

3 p.m. on SPEED

Phoenix International Raceway

Avondale, Arizona

4:30 p.m. on ESPN2

Circuit of the Americas

Austin, Texas

5:30 p.m. on SPEED (Same-day broadcast)

Adelaide Street Circuit

Adelaide, South Australia

11 p.m.

Edward Jones Dome

St. Louis, Missouri

12 a.m. on CBS (Race from Saturday)

Phoenix International Raceway

Avondale, Arizona

3 p.m. on FOX

Daytona International Speedway

Daytona, Florida

(Race from Jan. 27)

4:30 p.m. on SPEED