The several ski trails on Burke Mountain are all walkable during the summer, but they will not appear as smooth as when covered with snow, and the trip down will take considerably longer on foot than on “boards.” The Bear Den Ski Trail is especially good for geological sightseeing. NEARBY AREAS TO VISIT While at Darling State Park a visit to Lake Willoughby is well worth the trip (Figs. 19, 20). A glance at Figure 1 will show you its general location. Once you visit this lake, you might ask “why so beautiful a Lake Willoughby?” There is still some question as to the origin of the lake basin, but a combination of oriented joints and recent glacial movement seems to fit the picture. Deeper and faster weathering along parallel joints together with glacial movement and scour in the same direction as the joints probably dug the elongated trench which, when filled with water, became Lake Willoughby. It is hoped that this pamphlet has given you the desire to enlarge your knowledge of the science of geology. Geology is all around you wherever you might travel and a knowledge of geology will open new roads even while traveling old ones. Here’s luck to you in your travels; try to _see_ what you look at. [Illustration: Figure 18. Geologic map of Darling State Park.] Granite-Metamorphics Observation Tower Burke Summit Rd. Bear Den Trail Fire Trail Park Boundary Contour Line Dip and Strike: Bed Dip and Strike: Bed? Dip and Strike: Joint [Illustration: Figure 19. View of Lake Willoughby, seen from its north shore. Mount Pisgah on the left, Mount Hor on the right. The Lake Willoughby trough was produced by preferential erosion of a joint system accentuated by glacial movement and erosion in the same general direction. The lake bottom opposite Mount Pisgah is 210 feet deep.] [Illustration: Figure 20. Northwest View from the Burke Mountain summit road. Picture taken just above the old C.C.C. Camp and the present location of the Bell Gardens. Note Lake Willoughby trough in the distance. Mount Pisgah is on the right and Mount Hor on the left. Lake Willoughby lies in this trough.] SUGGESTED READING Leet, L. Don and Judson, S., 1965, _Physical Geology_, 3rd Edition, Prentice-Hall, Inc., Englewood Cliffs, New Jersey. This is a starter for the geology student. Dunbar, C. O., 1959, _Historical Geology_, John Wiley and Sons, New York. Also a beginning book, read after above book. Dennis, John G., 1956, _The Geology of the Lyndonville Area, Vermont_, Vermont Geological Survey Bulletin 8. This is for the more advanced student and relates the geology of the area adjacent to Burke Mountain and Darling State Park. Jacobs, Elbridge C., 1941-42, _The Great Ice Age in Vermont_, Report of the State Geologist, Vol. 23; pp. 27-47.