Conversation so far:
Why is Boise called the city of trees?
Boise has long been called the “City of Trees,” but in 1863, when the town was platted on a dry sagebrush plain between the newly established military post and Boise River, the nearest trees to be seen were cottonwoods and willows along the river and pines and firs miles away
How did Boise get its name?
The name may instead derive from earlier mountain men who named the river that flows through it. ... Set in a high-desert area, the tree-lined valley of the Boise River became a distinct landmark, an oasis dominated by cottonwood trees. They called this La rivière boisée, which means the wooded river.“

Question: What is there to do in the summer
Self-contained rewrite: What is there to do in the summer in Boise?