This is how I shot and edited the photos to create a star trail in Photoshop.
We will visit the location before the night shooting session in order to see the access and possible setup places.

Versión española: https://www.youtube.com/watch?v=vAj1urYyGRw

I will also show you how to shoot time lapse photography, the camera settings and how I took the dark frame used to subtract the noise from the image once the star effect is created in Photoshop.

A few advices
Scout the location during daylight if possible.

Take a flashlight for light painting the foreground

Take head lamp for your safety, you will walk safer and you will be seen by others.

Check the terrain and wear proper shoes