Is it possible to upload only indoor events to strava

Strava pulls all activities from Garmin's API, and does no filtering. Personally, I keep imported activities in Stava "private" by default, and only set them visible to friends, when I want to share them. In this way, besides having the choice which type of activity will be visible, I have also the time to add some photos and comments, before publishing the workouts. 

Ah thanks for your quick answer.

I normally upload my outdoor activities like mountain biking and race biking with my Wahoo but since I have a Garmin forerunner he also upload it to strava. I know that you can erase the activity but I thought maybe you could choose which kind of activities upload automatically.

I answered it in my previous post - no, you cannot select what Strava pulls from Garmin's API, but you can disable the automatic publishing, and control it manually.

Another option is disabling the auto-upload entirely, and only upload activities you wish to publish on Strava, manually.

I could do that! 

Thanks for your help. 

Hope that they maybe change it in the future

Not without another app or service in between.

I asked something similar recently and someone offered one, maybe I'll find it again. 

I think it was e7andy. I do not remember the name of the app either. I bet you could google it, though

I'm using activityfix.com to modify the activities in Strava after they have been transferred.

I mute the ones I want to hide from the feed. They are still available if you look in my account, but they will not spam my followers.