| Document and Entity Information | Oct. 01, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001853513 |
| Document Type | 8-K |
| Document Period End Date | Oct. 1, 2021 |
| Entity Registrant Name | Mister Car Wash, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40542 |
| Entity Tax Identification Number | 46-1393909 |
| Entity Address, Address Line One | 222 E 5th Street |
| Entity Address, City or Town | Tucson |
| Entity Address, State or Province | AZ |
| Entity Address, Postal Zip Code | 85705 |
| City Area Code | (520) |
| Local Phone Number | 615-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, par value $0.01 per share |
| Trading Symbol | MCW |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
