The release candidates for the first 1.67.0 beta release are now available at: https://dl.bintray.com/boostorg/beta/1.67.0.beta.1/source/ The release notes can be previewed at: http://www.boost.org/users/history/in_progress.html The documentation is available at: http://www.boost.org/doc/libs/1_67_0_beta1/ The SHA256 checksums are as follows: 3d52af11ea6c45c73e18bf9b386056d31dab5092923cc9ed8efa29a083ffb9de boost_1_67_0_b1_rc1.7z 680336bd9a56dccda359061660348c5656cab71cb76713b157ce9a6f840659f0 boost_1_67_0_b1_rc1.tar.bz2 a4608b3ee0b4fadad7b2a2a9efa7c4ad8ce120ee94232e0ee86796f38cced319 boost_1_67_0_b1_rc1.tar.gz 3d1faa96ddda6f0a864f3292c014420457159f0960ff82efcca9feb898d21c1a boost_1_67_0_b1_rc1.zip 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.