We’re in Old Sac now. Will be chilling here for about 2 hours before the final rider comes in. We did catch the riders and mail bag exchange at the fish hatchery ▲ 38.634, -121.2243, the station after the Folsom History Museum.
@Railer13 these photos are for you!
We met the outgoing rider. He’s the one that will take the mochila, or mailbag, from the incoming rider.
Outgoing rider talking with support staff
Outgoing rider pointing to the route he plans to take
Outgoing rider, while waiting for incoming rider, visits a horse in a trailer.
Incoming rider arrives! Of the two riders on the left, the incoming rider is the female rider on the right. The male rider on the left is her husband.
Outgoing rider, at right, dismounts to take mochila from incoming rider. An interesting factoid is that the incoming rider, when she passes the mochila to incoming rider has to sign a form that’s in the mochila. Every rider on the trail signs that form. Well, nobody had a pen but I did so they used that for the signing. I saved the integrity of this Pony Express run! 
Outgoing rider, standing and holding his horse, approaches incoming rider to accept the mochila.
The outgoing rider at right secures the mochila.
Zoomed in on the mochila.
Mochila secured, he’s ready to go.
Mochila. As a motorcycle rider I’ve had soft saddlebags, and hard. So I was curious about these. I’ve never had leather. I ride BMW, not Harley.
He’s off! If you hear the William Tell Overture, you’re not the only one. 
Away!
BullittBoss pets the incoming horse.
Husband of incoming rider
We’re with the incoming rider.
So, get this, this couple lives on Oahu’s North Shore and they volunteer to do this every year. Interesting.
On their vest they wear the flag as it looked in 1860
Interesting factoid, each rider carries a bible on them, just like they did in 1860-1861
Certified bible
Here in Old Sac, the final rider should arrive approx 1730U (U for Pacific time zone). Right now it’s 1530U.
More to come…