3780 Top Loaded Mountain is an easy 4 point summit in Washington. I was able to activate this summit while out camping with my family at nearby Chehalis RV and Camping Resort. Looking for summits nearby to activate using my SOTA Spotter app 3780 Top Loaded Mountain and Rooster Rock showed up and both had been activated already. Usually that's a good sign that there is a good way to the summit.
I activated this summit after I activated Rooster Rock. Directions are here. These directions will get you started for Top Loaded Mountain as well.
After activating Rooster Rock make your way back to NF-71 from the gate and turn left. Follow NF-71 for roughly 4 miles to N46.65681 W122.47630. There will be a road to your right that leads to the summit. Road could probably be driven up to summit but we parked and hiked up. It's less than half a mile hike.
Good views up top and plenty of trees for antenna.