Open the Garmin Connect app.
Access the menu by selecting More (bottom right).
Select Training & Planning.
Select Workouts.
Select the workout you want to delete.
Select
(top right).Select Delete Workout.
Confirm that you wish to delete the workout.
Select your product to confirm this information applies to you
How Do I Delete a Workout?
Previously created workouts stored in the Garmin Connect™ application program or on the device can be deleted.
From a Watch:
NOTE: This will not remove the workout from your Garmin Connect account.
Access the Activity Profile List on your device.
Select the Activity Profile.
Select Workouts.
Select the workout you want to remove.
Select Remove or Delete.
From an Edge® Cycling Computer:
NOTE: This will not remove the workout from your Garmin Connect account.
Select Training.
Select Workouts.
Select
or 
to access Workout Options.Select Delete Multiple.
Place a checkmark next to the workout you wish to remove.
Select
.
From Garmin Connect:
Select a platform below to reveal steps.
Sign into Garmin Connect.
Select Training & Planning from the navigation bar on the left.
Select Workouts.
Locate the workout you want to delete and select
(far right).Select Delete.
- Confirm that you wish to delete the workout.