What kind of shutter release do I need for a 35mm film Nikon?

My girlfriend wants to take pictures from a distance and I was wondering where I could buy one for a film camera. I don't know where to find them or how they look like. I'm so lost I just want to get her something cool and surprise her since she wants one so badly.

Here is where I would start: http://www.bhphotovideo.com/...ing+:++%24

It depends.

Autofocus SLRs often need a dedicated remote release, you'd be better to do a google search with the camera's make and model.

Manual focus models generally have a threaded hole drilled into the shutter release, this takes either a cable release (up to 2ft/60cm) or a pneumatic release, if you can find one (up to 20ft/6m).

Nikon has corded and wireless remotes for some of its film cameras. They are called Remote Release and Wireless Transmitters. You can access their manuals here.
https://support.nikonusa.com/...#Anchor-44

You are going to need to know what model her camera is, such as F6 or F100.

What kind of Nikon. Does the shutter button have a threaded hole inside? If yes, you can something like this.

http://www.amazon.com/...00FHHPSX0/

It will fit any camera brand with that hole.

If your camera's shutter release button is smooth, you will need a shutter remote that is compatible to your camera model.