All genome-wide maps of histone modifications, DNA accessibility, DNA methylation and RNA expression are freely available online. Raw sequencing data deposited at the Short Read Archive or dbGAP is linked from http://www.ncbi.nlm.nih.gov/geo/roadmap/epigenomics/. All primary processed data (including mapped reads) for profiling experiments are contained within Release 9 of the Human Epigenome Atlas (http://genboree.org/EdaccData/Release-9/). Complete metadata associated with each dataset in this collection is archived at GEO and describes samples, assays, data processing details and quality metrics collected for each profiling experiment.