Hike around Middlesex Fells Reservation

We will meet on the west side of the Oak Grove T Station (https://goo.gl/maps/DRqGEL7LzRHn7WyF9) where there is abundant parking at 1 pm and then we will walk 0.6 miles west to the Pinnacle Rock Trailhead.

From there we will walk around the park for approximately 1.5 hours and go to some of the places with views like Pinnacle rock and the MIT Geodetic Observatory which is apparently just a stick of wood in the ground.

Trail map here:
https://www.alltrails.com/explore?b_tl_lat=42.449547434048725&b_tl_lng=-71.09967124338822&b_br_lat=42.43625981851807&b_br_lng=-71.06554126657304

You can also RSVP on Facebook
https://www.facebook.com/events/921664901821597

and on LessWrong:
https://www.lesswrong.com/events/CnpusqQpSgDAktTss/hike-around-middlesex-fells-reservation

Feel free to come even if you don't read Astral Codex Ten.