Below are the NHRA Altitude Correction formulas for all sportsman categories for NHRA member tracks that are classified as altitude facilities:

NHRA ALTITUDE CORRECTION FACTORS Comp, S/C, S/G, S/ST
		Convert to Sea Level				Convert to Altitude
Track Name	Alt	ET	MPH	1/2ET	1/2MPH	ET	MPH	1/2ET	1/2MPH
DIVISION 4
Amarillo, TX	3700	.9646	1.0337	.9823	1.0168	1.0367	.9674	1.0180	.9834
Roswell, NM	3700	.9646	1.0337	.9823	1.0168	1.0367	.9674	1.0180	.9834
DIVISION 5
Denver, CO	5800	.9405	1.0563	.9702	1.0281	1.0633	.9467	1.0307	.9726
Douglas, WY	4900	.9508	1.0466	.9754	1.0233	1.0517	.9555	1.0252	.9772
Grand Junction, CO	4800	.9520	1.0455	.9760	1.0228	1.0504	.9565	1.0246	.9777
Great Bend, KS	1900	.9853	1.0143	.9927	1.0072	1.0149	.9859	1.0074	.9929
Julesburg, CO	3500	.9669	1.0315	.9835	1.0158	1.0342	.9694	1.0168	.9845
Pierre, S.D.	1700	.9876	1.0122	.9938	1.0061	1.0126	.9880	1.0062	.9940
Pueblo, CO	4900	.9508	1.0466	.9754	1.0233	1.0517	.9555	1.0252	.9772
DIVISION 6
Acton, MT	3700	.9646	1.0337	.9823	1.0168	1.0367	.9674	1.0180	.9834
Anaconda, MT	5100	.9485	1.0488	.9743	1.0244	1.0543	.9535	1.0264	.9762
Ashcroft, CAN	1700	.9876	1.0122	.9938	1.0061	1.0126	.9880	1.0062	.9940
Boise, ID	2700	.9761	1.0229	.9881	1.0115	1.0245	.9776	1.0121	.9887
Lewistown, MT	4100	.9600	1.0380	.9800	1.0190	1.0416	.9634	1.0204	.9814
Medicine Hat, CAN	2400	.9796	1.0197	.9898	1.0098	1.0209	.9807	1.0103	.9903
Prince George, BC	2200	.9819	1.0175	.9909	1.0088	1.0185	.9828	1.0092	.9913
Saskatoon, CAN	1600	.9888	1.0111	.9944	1.0055	1.0114	.9890	1.0057	.9945
DIVISION 7
Albuquerque, NM	5400	.9451	1.0520	.9725	1.0260	1.0581	.9506	1.0282	.9747
Fallon, NV	4000	.9612	1.0369	.9806	1.0185	1.0404	.9644	1.0198	.9819
Inyokern, CA	2400	.9796	1.0197	.9898	1.0098	1.0209	.9807	1.0103	.9903
Las Vegas, NV	2100	.9830	1.0165	.9915	1.0082	1.0173	.9838	1.0086	.9918
Palmdale, CA	2700	.9761	1.0229	.9881	1.0115	1.0245	.9776	1.0121	.9887
Salt Lake, UT	4400	.9566	1.0412	.9783	1.0206	1.0454	.9604	1.0222	.9798
Tucson, AZ	3000	.9727	1.0262	.9863	1.0131	1.0281	.9745	1.0139	.9871

NHRA ALTITUDE CORRECTION FACTORS Stock & Super Stock
		Convert to Sea Level		Convert to Altitude
Track Name	Alt	ET	MPH	ET	MPH
DIVISION 4
Amarillo, TX	3700	.9549	1.0479	1.0472	.9543
Roswell, NM	3700	.9549	1.0479	1.0472	.9543
DIVISION 5
Denver, CO	5800	.9276	1.0773	1.0781	.9282
Douglas, WY	4900	.9393	1.0647	1.0646	.9392
Grand Junction, CO	4800	.9406	1.0633	1.0632	.9405
Great Bend, KS	1900	.9783	1.0227	1.0222	.9778
Julesburg, CO	3500	.9575	1.0451	1.0444	.9568
Pierre, S.D.	1700	.9809	1.0199	1.0195	.9805
Pueblo, CO	4900	.9393	1.0647	1.0646	.9392
DIVISION 6
Acton, MT	3700	.9549	1.0479	1.0472	.9543
Anaconda, MT	5100	.9367	1.0675	1.0676	.9368
Ashcroft, CAN	1700	.9809	1.0199	1.0195	.9805
Boise, ID	2700	.9679	1.0339	1.0332	.9672
Lewistown, MT	4100	.9497	1.0535	1.0530	.9492
Medicine Hat, CAN	2400	.9718	1.0297	1.0290	.9712
Prince George, BC	2200	.9744	1.0269	1.0263	.9738
Saskatoon, CAN	1600	.9822	1.0185	1.0181	.9818
DIVISION 7
Albuquerque	5400	.9328	1.0717	1.0720	.9331
Fallon, NV	4000	.9510	1.0521	1.0515	.9505
Inyokern, CA	2400	.9718	1.0297	1.0290	.9712
Las Vegas, NV	2100	.9757	1.0255	1.0249	.9751
Palmdale, CA	2700	.9679	1.0339	1.0332	.9672
Salt Lake, UT	4400	.9458	1.0577	1.0573	.9454
Tucson, AZ	3000	.9640	1.0381	1.0373	.9633