When is NASA going to send humans to Mars?
We don’t know yet. It will almost certainly be several decades, at least, before we send humans to Mars. There are several things on our plate to finish before then. We plan to complete the International Space Station. We also hope to return to the moon and establish an extended human presence there. There are more robotic vehicles in the pipeline as well to pave the way for human explorers. These missions range from rovers like the ones on Mars now (but, able to do more, and travel farther and more quickly) to ones which will actually launch samples of Mars all the way back to Earth.