To reset your password, go to Account – Runner's Athletics (runnersathletics.com) and click on “Forgot your password?” next to the sign-in button.
You will then be prompted to enter your email address you used to create your account. Once you submit, you will receive an email notification with a link to reset your password.
Once you’ve done this, you can log in with your new password as normal on this page: Account - Runner's Athletics (runnersathletics.com)