The Boxborough Esker Walk in memory of George Krusen is sponsored by both the Boxborough Conservation Trust (BCTrust) and the Friends of Pinehawk. The landscape of Boxborough was sculpted over millions of years, but some of the most dramatic features formed “only” about 15,000 years ago. The Beaver Brook Valley Preserve protects a beautiful example of an esker – a long, sinuous ridge of sediment that was formed under the edge of an enormous glacier at the end of the last ice age.

Tufts geologist Anne Gardulski will guide the walk along the crest of the Boxborough Esker and explain how it formed, looking at the evidence in the sediments. Rita Grossman, BCTrust’s president, will also note how the efforts of George Krusen were key in protecting this significant geological feature from being fully excavated for gravel to build I-495. George also deeply appreciated the Native American imprints on the land in our region. Brian McClain from Friends of Pine Hawk will point out possible Indigenous stone structures including those as described in the book Manitou, which will be discussed at the Pinehawk event taking place on November 13th.

Note: this trail walk involves climbing steep terrain. Details, including preparation, will be emailed to registrants a few days in advance. For ages 13 and up and is limited to 40 participants.

Rain Date Sunday, November 16 1-3 PM

In person only. All programs are free but require registration here.

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The Friends of Pine Hawk 2025 Fall Programs are presented with support from the Acton Memorial Library and Freedom’s Way National Heritage Area.

All programs are free but require registration here

Link to entire 2025 Friends of Pine Hawk Fall Programs lineup (PDF)