1970 the last year the Dirt Champ cars where part of the National Champion Schedule.

Date Race Track Miles Type Winner
3/28/70 Jimmy Bryan 150 Phoenix 150 PO Al Unser
4/4/70 Golden Gate 150 Sears Point 151.38 RC Dan Gurney
4/26/70 Trenton 200 Trenton 201 PO Lloyd Ruby
5/30/70 International 500 Mile Sweepstakes Indianapolis 500 PO Al Unser
6/7/70 Rex Mays Classic Milwaukee 150 PO Joe Leonard
6/14/70 Langhorne 150 Langhorne 150 PO Bobby Unser
6/28/70 Rocky Mountain 150 Castle Rock 151.62 RC Mario Andretti
7/4/70 Michigan Twin 200s MIS 200 PO Gary Bettenhausen
7/26/70 Indy 150 IRP 150 RC Al Unser
8/22/70 Tony Bettenhausen 100 Springfield 100 DO Al Unser
8/23/70 Tony Bettenhausen 200 Milwaukee 200 PO Al Unser
9/6/70 California 500 Ontario 500 PO Jim McElreath
9/7/70 Ted Horn Memorial DuQuoin 100 DO Al Unser
9/12/70 Hoosier Hundred ISF 100 DO Al Unser
9/19/70 Sedalia 100 Sedalia 100 DO Al Unser
10/3/70 Trenton 300 Trenton 264 PO Al Unser
10/4/70 Golden State 100 Sacramento 100 DO Al Unser
11/21/70 Bobby Ball 150 Phoenix 150 PO Swede Savage

Over 100 different drivers attempted to qualify for a race that season.