On her way to run 100 marathons in 100 days, the Boston Marathon will mark number 92 in a row.
We checked in on the ultrarunner midway through her attempt at a women's world record.
Eleanor Beason may not be the fastest runner, but she knows a thing or two about how to commit to running and find longevity in the sport.
They are three of 62 people listed on the United States Running Streak Association registry as running every day for 30 years or more.
Thinking of doing a run streak this holiday season? One streaker has the pros and cons.