Tours, talks, hikes, and seasonal gatherings at Blue Hill Observatory on Great Blue Hill.
Tours, talks, hikes, and seasonal gatherings at Blue Hill Observatory on the summit of Great Blue Hill in Milton, and online.
Every weekend
Weekend public tours
Saturdays and Sundays · 10:00 AM to 4:00 PM · Last weekend tours of the year: December 26 · Closed all of January
Walk up Great Blue Hill and step inside the Observatory. Discovery Tour $10, free for members, children under 5 free. Café 635 & Shop is open during public hours.
Monday, December 14 · 11:30 AM to 1:00 PM · Blue Hill Observatory · Free, RSVP required
Help restart amateur radio on Great Blue Hill. The founding meeting of BHO-ARC, the Observatory’s amateur radio club, building on nearly a century of radio on this hill. Licensed operators and the radio-curious are both welcome. Club members are also members of the Observatory, and you can join at the meeting.
The Observatory is about a mile’s walk up the paved Summit Road from the Trailside Museum lot, 1904 Canton Ave, Milton. Allow 20 to 30 minutes.
Monday, December 21 · 3:15 to about 4:45 PM · $25, free for members · Limited to 15 · Booking opens December 1
Watch the shortest day of the year end from the roof of Blue Hill Observatory. We meet at the Trailside Museum lot and walk up the paved Summit Road together.
3:15 PM: meet at the Trailside Museum lot, 1904 Canton Ave, Milton, and walk up together (about 1 mile, 20 to 30 minutes).
About 4:15 PM: sunset from the Observatory roof.
About 4:30 PM: walk down together in the last light. Bring a headlamp and dress for the summit.
Saturday, May 15, 2027, 10 AM to 3 PM, during Climate Week. Check-in from 9:15 AM. A climb up Great Blue Hill to the summit where the weather record lives.
Saturday, September 18, 2027, 10 AM to 3 PM. Check-in from 9:15 AM. Our signature annual climb up Great Blue Hill. Proceeds fund field trips, internships, and science careers for young people.
