Hundreds of marathons later it wasn't the start he feared, it was the last 10 km that were tough.
"It's a matter of understanding there is going to be some rocky time ahead so then it's time to dig deep and have enough in store when you really need to call on it."
It was a tough day for him, his doctor thought he shouldn't compete but he knew his limits and would adjust accordingly.
Unlike Morrow for the wheelchair pilot class in the marathon it was uncharted territory.
For the first time at the Auckland Marathon a wheelchair pilot class was being tested.
About 12 competitor in wheelchairs and recumbent bikes kicked off 5 minutes before the official start.
The first competitors of the Auckland half marathon crossed the finish line just after 8am.
Oska Inkster-Baynes of Christchurch came in in first place, Michael Vauss in second and Cameron "Forrest Gump" Graves of Auckland in third.
For the woman's half marathon Camille Buscomb came in first, Lisa Cross second and Hannah Wells third.
David Criniti crossed the finish line first for the full marathon with Daniel Jones coming in second and Isiais Beyn finishing third.
It's thought around 15,000 runners were taking part in he marathon in some capacity according to officials.