When we got into the water (9:30am) there was high tide, and the beach looked like this:
Once we got out (aroung 12:30pm) it was like this:
...which is a little bit weird because you could almost walk from Laida to Mudaka keeping your feet dry... that's low tide in the Basque Country! :)
To give you an idea, look at the map below. The distance marked here is 400m, that's where the seashore was at the end of the session. A long walk expected us to get back to the parking...
Some technical notes. I shooted the video above using a different mount for the GoPro, the helmet front mount module plus the curved adhesive fixing part (see picture below). This provides the camera better stability than the vented helmet strap I used for most of my previous videos. I'm quite happy about the result. This mount allows a different (and, in my opinion, a better) shooting angle too. The only drawback is the fact that I'm a little bit afraid of loosing the camera while riding... I don't really trust in the adhesive to keep the camera fixed onto the helmet. I think it makes sense to add a leash in order to prevent the camera getting lost in case it detaches from the helmet.