I know it's off-topic, but I'm proud...the woman I ride with and I rode 2 of her Morgans today and they were at a 12.5 mph trot! One of them was holding back too, so I'm excited to see what her limit is. =)
OP, I think if you plan to continue to trail ride and want a good idea of how far you can go and what kind of time you're making a GPS watch or one of the ones you could clip onto your saddle would be a good investment. Some of them even tell you how steep of a grade you're on! They are good though for seeing how fast you're going and how far you've gone if you want to keep track of all the information. Especially useful if you want to compete CTRs or endurance =)
A horse is the projection of peoples' views about themselves--strong, powerful, beautiful--and it has the capability of giving us escape from our mundane existance.