Very good points. Castle Rock has some nice trails along the Cowlitz and the Kelso dike trail is OK but not too scenic being near the freeway and industrial areas. Consider what Vancouver has done: convert a former industrial site on the Columbia River to new apartments and a park that is crowded with families on nice days. It's possible to walk along the Columbia in Vancouver for miles.
Very good points. Castle Rock has some nice trails along the Cowlitz and the Kelso dike trail is OK but not too scenic being near the freeway and industrial areas. Consider what Vancouver has done: convert a former industrial site on the Columbia River to new apartments and a park that is crowded with families on nice days. It's possible to walk along the Columbia in Vancouver for miles.