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picture of 2021 USAC Sprint Car Keystone Invasion

The Keystone Invasion for the AMSOIL USAC National Sprint Car National Championship features four races in four days at Grandview, Big Diamond, BAPS, and Path Valley.

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Feature Replay | USAC Sprints at Big Diamond Speedway

Apr 24, 2021

Watch the USAC National Sprint Cars feature replay at Big Diamond Speedway from Apr 23, 2021 on FloRacing

    Full Replay | USAC Keystone Invasion at Path Valley Speedway 4/25/21
    1:20:41
    Full Replay | USAC Keystone Invasion at Path Valley Speedway 4/25/21

    Apr 26, 2021

    Feature Replay | USAC Sprints at Path Valley Speedway
    35:09
    Feature Replay | USAC Sprints at Path Valley Speedway

    Apr 26, 2021

    Semi-Main | USAC Sprints at Path Valley Speedway
    8:10
    Semi-Main | USAC Sprints at Path Valley Speedway

    Apr 26, 2021

    Heat Races | USAC Sprints at Path Valley Speedway
    20:55
    Heat Races | USAC Sprints at Path Valley Speedway

    Apr 26, 2021

    Qualifying | USAC Sprints at Path Valley Speedway
    16:26
    Qualifying | USAC Sprints at Path Valley Speedway

    Apr 26, 2021

    Highlights | USAC Sprints at BAPS Motor Speedway
    3:08
    Highlights | USAC Sprints at BAPS Motor Speedway

    Apr 25, 2021

    Full Replay | USAC Keystone Invasion at BAPS Motor Speedway 4/24/21
    5:27:29
    Full Replay | USAC Keystone Invasion at BAPS Motor Speedway 4/24/21

    Apr 24, 2021

    Recap | USAC Sprints at BAPS Motor Speedway
    8:42
    Recap | USAC Sprints at BAPS Motor Speedway

    Apr 24, 2021

    Feature Replay | USAC Sprints at BAPS Motor Speedway
    25:35
    Feature Replay | USAC Sprints at BAPS Motor Speedway

    Apr 24, 2021

    Heat Races | USAC Sprints at BAPS Motor Speedway
    28:31
    Heat Races | USAC Sprints at BAPS Motor Speedway

    Apr 24, 2021

    Full Replay | USAC Keystone Invasion at Big Diamond 4/23/21
    5:09:52
    Full Replay | USAC Keystone Invasion at Big Diamond 4/23/21

    Apr 24, 2021

    Flashback: USAC Sprints at Big Diamond 6/23/21
    3:01
    Flashback: USAC Sprints at Big Diamond 6/23/21

    Apr 24, 2021

    Recap | USAC Sprints at Big Diamond Speedway
    6:54
    Recap | USAC Sprints at Big Diamond Speedway

    Apr 24, 2021

    Feature Replay | USAC Sprints at Big Diamond Speedway
    28:35
    Feature Replay | USAC Sprints at Big Diamond Speedway

    Apr 24, 2021

    Joey Biasi Huge USAC Sprint Flip at Big Diamond
    1:25
    Joey Biasi Huge USAC Sprint Flip at Big Diamond

    Apr 24, 2021