We have maps, many maps, with courses. You're welcome to as many of those as you can carry away :)
Susan, I'm afraid I'll be out of town when you're visiting, otherwise I would definitely host some sort of training. At the very least, should you want forest I recommend getting into the Fells, as it is super interesting. Just be prepared that near the marshes, there is a lot of greenbriar, which is spiky and not fun.
Franklin Park can be a lot of fun - we just held two national meet races there in early June, so can provide you with those maps. Franklin Park is really easily reached from the T, our aging and sometimes-useful metro system.
As Ross said, the view from Peter's Hill in the arboretum is fantastic, especially on a clear day. We ran a race there this year, so can furnish those maps, too. Most of the city parks nearer the city are pretty one-dimensional running across fields, but North Point Park can get a little tricky, and we had a good course there for Sprint Camp. A good day of tourism would be a sprint at Boston Common, which is also the start of the Freedom Trail, a walking tour of Boston's history. The tour ends at Bunker Hill, across the river, which is within a half mile of North Point Park. Might be a long day on your feet, but fun! I recommend stopping to refuel with a cannoli from Mike's pastry in the North End along your walk.
Graeme, any chance you'll still be around on the 17th? CSU is running Forest-X
, basically a trail race with the chance to take short cuts, using an orienteering map. If you can, it would be fun to have you there!
Both of you PM me, and we'll find a way to get you maps. Yay for Boston!