If you haven’t used it, here’s how. Go to the Maps Page and click on Property Viewer. It will take a minute or two to load. Move the map around and zoom in on the area you want.
At the bottom left is a tab called Layers. Click on that. Then check off the items you want to see. I was looking for a possible trail route, so I selected Elevation and Contours, plus Parcel boundaries. Then I clicked on Filter (upper left). Again, this is a little slow to refresh. Be patient. Then you should see the contour details.