| 1970 USAC Championship Car season | |
|---|---|
| USAC National Championship Trail | |
| Season | |
| Races | 18 |
| Start date | March 28 |
| End date | November 21 |
| Awards | |
| National champion |  Al Unser |
| Indianapolis 500 winner | Al Unser |
The 1970 USAC Championship Car season consisted of 18 races, beginning in Avondale, Arizona on March 28 and concluding at the same location on November 21. There was also one non-championship event at Pikes Peak, Colorado. The USAC National Champion and Indianapolis 500 winner was Al Unser. After this season, dirt courses did not reappear in the USAC Championship until 1981-82. Road courses after this season did not reappear in the USAC Championship until 1977. The Pikes Peak Auto Hill Climb was the only non-championship event.