The trail is relatively flat with only gentle grades.

The gentle grade is easy for just about anyone.

The car began to roll forward, down the gentle grade of the boat ramp.

The wagons were still ascending the same gentle grade they'd been on for the last hour.

Then I coasted down the gentle grade toward the beach.

Again the trail led only up the gentlest grades.

The tracks rose up a gentle grade and dipped on its other side.

From her perch, the snow sloped away in a gentle grade.

The ground dropped at a gentle grade, and half an hour later it was flat, at the level of the water.

They were going up a gentle grade, Mule laboring as best he could but in no hurry.