In this study, we have produced reference quality chromosome scale genomes for both classical and wild derived inbred laboratory mouse genomes. These genomes were produced using third generation long reads and Hi-C. The genomes and gene annotation are also available via the Ensembl and UCSC genome browsers.The Mouse Genomes Project releases genome sequence data, SNPs and other variant calls as a service to the research community. These data are released in accordance with the Fort Lauderdale agreement and Toronto agreements. As producers of these data we reserve the right to be the first to publish a genome-wide analysis of the data we have generated. The pre-publication data that we release is embargoed for publication except for analyses of single chromosomes in single strains or single gene loci across multiple strains. We strongly encourage researchers to contact us if there are any queries about referencing or publishing analysis based on pre-publication data obtained via this website (Email: mousegenomes@sanger.ac.uk OR the PI, Thomas Keane, tk2@ebi.ac.uk).