The recorded course is about 1km west of its true location.
Also the recorded altitude is over 2000m while the true altitude is less than 100m.
The recorded course is about 1km west of its true location.
Probably you did not wait till the GPS lock, or have an outdated EPO file, so it started recording later.
Also the recorded altitude is over 2000m while the true altitude is less than 100m.
Looks like you need to calibrate the altimeter. To fix it in that specific Activity, enable the Elevation Correction on the page of the concerned activity in Garmin Connect Web.