The first release candidates for the 1.81.0 release are now available at: https://boostorg.jfrog.io/artifactory/main/release/1.81.0/source/ The SHA256 checksums are as follows: 205666dea9f6a7cfed87c7a6dfbeb52a2c1b9de55712c9c1a87735d7181452b6 boost_1_81_0_rc1.tar.gz 6e689b266b27d4db57f648b1e5c905c8acd6716b46716a12f6fc73fc80af842e boost_1_81_0_rc1.zip d7bc4e2a2aee374a8c24832cacfed1265680c1e824d09fab3e00f87508155353 boost_1_81_0_rc1.7z 71feeed900fbccca04a3b4f2f84a7c217186f28a940ed8b7ed4725986baf99fa boost_1_81_0_rc1.tar.bz2 As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy. -- The Release managers