The three options are below.

1. Using the mobile app - Tap the "progress" tab at the bottom of the screen and enter your distance.

2. On the web at www.myvirtualmission.com. Log in and enter your distance just below the map on your mission page.

3. Via your connected devices/apps. Go to "My Connections" from the main menu.

Please note that the mission needs to be "launched" in order to post distances to it.