That sounds like a plan to me (you said you would gradually get him up to your full hike?) - ESPECIALLY if Riddick isn't tired when you get home - that could be a clue he can go farther, but I don't know what the difference in altitude is AND you might want to check out the topic I linked below.
It is a forum article and Allison gives a lot of good advice and things to think about. I hope it helps.
With the two my sister & I have, they seem like they can keep going forever and then when we leave the Dog Park they are laid out flat in the back seat on the ride home!
This year, the oppressive humidity came on quick instead of building and both dogs are taking a bit to acclimate (in their own ways) so I have to keep a more watchful eye.
When Coffey was about 18 weeks old? he was running in the Big Dog park because he was a bit over energetic for the small dog even though he was still small.
He also never had the hunched hind quarter "puppy" run. Since we got him at 8 weeks he has stretched to a full out run.
Well, while running in the bigger space, he was running fast. He tripped in a small hole in the ground (front left paw) went for a tumble and got up and kept on going.
When he came back around and slowed up we noticed he had started limping. We rested him for a few days and then noticed the left shoulder bone was sticking out a bit more and he started walking more on his toes sometimes on that foot. I could feel cartilage or ligament in between shoulder blade and leg where it's not stretched on the other shoulder.
So, warm compresses, more rest for 2 weeks and then slowly letting him back to exercise and water therapy. The ligament or cartilage "stretch" is still there and he's over a year old now. It doesn't pain him but he still gets a limp every now and then depending on the terrain and when he gets tired.
The Vet can't really explain it except to say Coffey might have arthritis when he gets older.
My sister was accident prone as a child and Coffey has followed in her foot steps ... oh, how our dogs are like us ....
Coffey still once in a while does this when he gets excited on the leash - jumps up and spins like a marlin breaching on a fishing line - well he landed in front of me while I was stepping my foot onto the ground (I was in stride) and I stepped on the pup.
He didn't act hurt at all and there was no swelling when I looked the foot over (everything looked in the right spot, he showed no tenderness) so we went in to park instead of going home. Later, again after a few days, front his right foot swelled. Movement restriction AGAIN. Coffey now has a probably dislocated toe and the front right foot is a little wider than his other tight round paws. It looks like he's giving the middle finger sometimes now. He never limped on it and nothing wrong with the bones themselves.
He digs holes in the yard perfectly fine. He uses that foot too because when he dug a narrow hole I could see the toe nail mark from that middle toe.
I am so glad he has reached a year old. I know they still grow until 2 yrs but the 1 year mark was a milestone!
Coffey is very double jointed, more so than Tayamni was as a puppy. He still does pretzel contortions while playing with other dogs.
Tayamni has always done the run, lay and stalk, run and repeat - so she conserves her energy and can play at the park longer than Coffey.
They both do the drop and roll when running & playing with bigger heavier dogs.
Also, like frisbee, people use the hand held ball chuckers and some younger dogs have gotten patella problems. There are some posts on the site (going back to 2013?)
I feel really bad still about landing on Coffey (who landed in front of me) but I still feel bad it happened from me.
That's why I'm replying, it's my examples of how active and over active these pups can be.