An image of railroad tracks and sign which says Eddy leads to a valley with steep canyon walls.
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Science MuseumsCoulee Dam, WAUnited StatesOfficial pages checked

Ice Age Floods National Geologic Trail

Coulee Dam option for an outdoor or weather-aware trip; helpful details include price, group visit, and reservation.

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Best forGood for elementary grades and older siblings
CostAdult/chaperone rules are part of the group trip details.
Trip facts

What matters for planning

Official links included
Price estimatePublished rate available: Free.Open prices
Weather fitMostly outdoors; check heat, rain, mud, and seasonal hours.
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Plan to verify lunch directly with the venue before setting the final schedule, cost, or bus plan.