1. I'm looking to merge together 3 GPX files. How do I do this?

The route I am trying to create is a blend of two MTB routes in southern Spain (TransAndalus and TransMurciana). I can map out these sections of the route quite easily using the tool on their websites:
> TransAndalus: http://vita.comuv.com/
> TransMurciana: http://vita.hol.es/

2. How can I create my own GPX route between Agua Amarga and Aguilas (part b)?
a) TransAndalus: Starting from Malaga airport, travelling east as far as Agua Amarga
b) GPX needed: Agua Amarga to Aguilas
c) TransMurciana: Starting from Aguilas, traveling via coastal route to San Javier

Any help will be greatly appreciated.

Problem 1. solved:-

http://joewein.net/bike/gpxmerge/

Thanks Dave.
Do all files have to have the suffix .GPX? When I am trying to export the GPX files from the TransMurciana route (http://vita.hol.es/) it just present a list of code, and when I save it, it saves it as a .html.

(And yep - I'm a technophobe!)

Firmo wrote:Thanks Dave.
Do all files have to have the suffix .GPX? When I am trying to export the GPX files from the TransMurciana route (http://vita.hol.es/) it just present a list of code, and when I save it, it saves it as a .html.

(And yep - I'm a technophobe!)

Usually, you'll want to right-click on the link, then "Save link as..." then name it somethingorother.gpx

Having looked at the two routes they look good but there's a bit in the middle missing I assume you want to join them up with more trails. If so I would look at joining them with help from the sierra Nevada loop that some one posted on here a few months ago I may have the gpx if I find it I'll email you.
Just been looking and the route is the transnevarda450. U can find it at andalbike. Com

I have managed to get my GPX file for (1) Malaga to Agua Amarga (TransAndalus) and (3) Aguilas to San Javier (TransMurciana).

I now need to get a route from Agua Amarga to Aguilas.

What is the best way to do this? Map something out myself? If so, what site to use?
Or is there a website that contains existing maps of MTB routes (or walking routes) that would enable to me to enter a start and finish point and it creates a GPX file for me?

FYI, I looked on http://andalbike.com but couldn't find a route, and I tried to create a route using https://www.justgoride.co.uk/routes/create/ but this sticks to the road.

UPDATE - I've sorted this now.
I know almost everyone here probably knows how to do this already (and probably knows of more efficient ways), but in case anybody ever stumbles on this post in the future who is as equally clueless as I am, here's what I did:

Found a route at es.WikiLoc.com (Agua Amarga to Aguilas)
The route was backwards, so I used bikehike.co.uk to reverse it, and saved the route as a GPX Track
I then uploaded the three GPX files at joewein.net
And was able to view the files in different ways at gpsvisualizer.com