Sedgwick PK is located 9 miles South of Lava Hot Springs. One on the few drive up summits in Eastern Idaho.
After reaching Lava Hot Springs Idaho, Proceed South on Dempsy Creek Rd towards the Lava Hot Springs Cemetary/Golf Course. You will see a sign reading Henderson Canyon before the cemetary road. It is a service road to Sedgwick. Travel approx. 3-4 miles up Henderson Canyon until you reach a service road on your left called Wyoming Trail. Take this road approx. 6 more miles to the Sedgwick Summit. I recommend you take a UTV or ATV. It is a rugged 4x4 road the last 3 miles to the Summit. If you miss Wyoming Trail Rd you will run into gated property named Thunder Mountain. The gate is a couple hundred of yards South of Wyoming Trail.
There are alot of towers located at the summit so you may have some RF interference.
I would not venture a Winter activation unless you have snow machines or a track vehicle.
If you reach the summit on a clear day you can see the Grand Tetons as well as the Wind River range in the NE horizon.
I own property on Thunder Mountain so hit me up if you want to plan a summit.