Park at Welsh Woods, Euclid Creek Park Pavillion on Google. Use the south lot. Listed parking coordinates will have you very close to the trailhead. Walk across the suspension bridge that crosses Euclid Creek. This should be an easy find near a scenic spot on the trail. I have added another waypoint for a scenic overlook that is uphill, 130 feet, from here. The view is worth the walk.
FTF accolades go to JimC61!