But the park says little impact is expected on visitors enjoying the summer season because most of the work will be during the night.
Crews will construct and widen a 2.5-mile stretch of road between Tower Junction and Tower Fall and reconstruct the Canyon Village parking lot.
The Tower Road work will result in closures from 11 p.m. to 7 a.m. into September. There could be 30-minute delays during open hours.
The Canyon Village Main Parking Area will be open during the day but closed from 11 p.m. to 6 a.m.
All stores will remain open for business during their normal operating hours.