ESPN just released the alternate channel info:
August 21, 2014
Saturday Night NASCAR Race at Bristol on Alternate Channels in Some Markets
The NASCAR Sprint Cup Series race at Bristol (TN) Motor Speedway is being broadcast live nationally by ABC on Saturday night, Aug. 23, but viewing will be affected in 15 markets due to NFL preseason games airing on local ABC affiliates.
In all 15 markets where the race telecast is being preempted, NASCAR fans who are satellite TV subscribers will be able to watch the race on ESPN alternate channels (DirecTV – channel 209-1; DISH – channel 145). For cable subscribers, the race will air on alternate channels in 11 of the 15 markets.
The telecast begins with NASCAR Countdown at 7 p.m. ET and the race’s green flag is scheduled for 7:43 p.m. The affected markets:
Austin, Texas – race telecast on digital cable: Time Warner channels 811 and 1240, Suddenlink channel 721, AT&T Channel 3024.
Charlotte, N.C. – race telecast on WAXN TV64. Available on Time Warner channel 1230, Charter channel 703, Compas channel 16, Comporium channel 110. WSOC-TV will join race in progress after football game ends.
Casper, Wyo. – only available to satellite TV subscribers
Cheyenne, Wyo. – only available to satellite TV subscribers
Duluth, Minn. – race telecast on digital cable: Charter channel 398, Mediacom channel 113.
Harrisburg, Pa. – race telecast on digital cable: Comcast channel 246, Verizon channel 461, Blue Ridge Cable channel 152, Kuhn channel 67, Nittany Media 228.
Houston – race telecast on digital cable: Comcast channels 315 and 685.
Louisville, Ky. – race telecast on digital cable: Comcast channel 432, Time Warner channel 207.
Nashville, Tenn. – race telecast on digital cable: Comcast channel 245, Charter channel 136.
St. Joseph, Mo. – only available to satellite TV subscribers
San Antonio, Tex. – only available to satellite TV subscribers
Sioux Falls, S.D. – race telecast on digital cable: Mid-Continent channels 596 and 614. (Also DISH channel 36).
Tulsa, Okla. – race telecast on digital cable: Cox channel 131.
Washington, D.C. – race telecast on digital cable: Comcast channel 205, Cox channel 806, Verizon FiOS channel 467.
Weslaco, Tex. – race telecast on digital cable: Time Warner channel 877.
In Milwaukee, Little Rock, Ark., Jonesboro, Ark., Fort Smith, Ark., and Tyler, Texas, the local ABC affiliates will not airNASCAR Countdown due to airing local newscasts but all will join ABC for the race telecast at 7:30 p.m. ET.