One of the blessings in disguise of having 1 million people on an island is there are plenty of hikes all around that are easy to get to. Some hikes are harder and more dangerous than others (people have died).
Hikes you can take your mom on.
DIAMOND HEAD
MANOA FALLS
MAKAPU'U LIGHTHOUSE TRAIL
KA'ENA POINT
These hikes may last for hours so stop whining.
MAUNAWILI FALLS
KULI'OU'OU
Yes, these hikes are here on the island and you sometimes see them on Instagram, but that doesn't mean that you can or should go there.
HAIKU STAIRS / STAIRWAY TO HEAVEN
SACRED FALLS
MAKAPUU - TOMTOM