Hello @Jhillj66, good to see you around in our Community. Indeed, when you are using the MobileRun feature only Run, Walk or Hike. Although I've seen in our Feature request board this is a very popular request along with cycling.
Perhaps is of your interest and if it so, you can review the following links to add your vote and share your comments. As a more popular is an idea more chances be considered in a future.
Tracking Exercise: Horseback Riding and Track Cycling on Mobile App with GPS
In the meantime I recommend to manually log these activities to improve the accuracy of this activity's contribution to your caloric burn. I bet you are familiar with this, but in case you need more information, take a look at this post I've shared before for other user.
Hope this helps and see you around.
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