Concept2 will be donating $19,000 to charity to mark Juneteenth. For every person who signs up from the home page of their logbook, and does at least 1900m on June 19, we will donate an extra $2, up to a maximum total amount of $38,000. Note: BikeErg meters count for half the distance when applied to the challenge. We have a special workout for BikeErg.