A nice image, good compositional balance smooth tones and a nice use of colour. Not so keen on the border, I think plain old black would have been better. As it is the colour and tonal match of the border pull my eye from the frame rather than constraining it within. The border wont affect my score though - borders have to be real awful before I let them influence my score.. lol
I'm not sure I understand the use of the tinting here. A good use of sepia is to create an old-time kind of feeling, but this really just tends to make it look like they're walking through muddy water.