Ada County Highway District

News and Press Releases Friday, June 12, 2015

Ironman event in Boise to bring impacts to local and state roads

Boise - Swim, bike, run - it's the annual competitive Ironman 70.3 Triathlon event bringing more than 1,200 athletes to the Boise area to compete, and draw thousands of spectators to cheer. The three events will take place in and around Boise on Saturday (June 13) starting mid-morning and continuing through late evening.

Traffic delays, road closures and detours should be expected along multiple Ada County Highway District (ACHD) and Idaho Transportation Department (ITD) roads that will serve as the biking and running courses.

Course maps for all three phases of the event can be found at the following link:

The following are specific impacts for the various portions of the race, involving both ITD and ACHD roads:


 Roadway Impacts:

-      US Highway 21 from Lucky Peak Dam to Warm Springs Avenue

o   Open/Expect delays between 10:00 a.m. to 3:00 p.m.

-      US Highway 21 from Warm Springs Avenue to Technology Way

o   Detour through Grand Forrest between 10:00 a.m. and 4:00 p.m.

-      US Highway 21 from Technology Way to Diversion Dam

o   Open/Left lane, Expect delays between 10:00 a.m. and 4:00 p.m.

-      I-84 Freeway Interchange at Eisenman Road

o   Closed

-      S. Eisenman Road between I-84 and the Factory Outlet

o   Closed between 12:50 p.m. and 4:45 p.m.

-      S. Eisenman Road between Gowen road and the Factory Outlet

o   Closed 10:30 a.m. to 3:00 p.m.

-      Gowen Road between S. Eisenman Road and Pleasant Valley Road

o   West only between 10:30 a.m. and 3:30 p.m.

-      Pleasant Valley Road between Gowen Road and Ten Mile Creek

o   Closed between 10:30 a.m. and 3:30 p.m.

-      Ten Mile Creek Road between Pleasant Valley Road and S. Cole Road

o   Closed between 10:30 a.m. to 4:00 p.m.

-      Warm Springs Avenue between US Highway 21 and Eckert Road

o   East only between 10:00 a.m. to 4:30 p.m.

Local law enforcement officers and event volunteers will be positioned along the race routes to direct traffic and help keep competitors and motorists safe. In several areas, police will assist motorists and residents who live along the race course with accessing or leaving their homes. Those driving along the bike course may, at times, drive alongside cyclists and are asked to use caution.

Boise Police, Ada County Sheriff’s Department and Boise Motor Escort will be providing escort for this event.

Competitors will start with the swim portion of the race at Lucky Peak’s Barclay Bay, followed by biking 56 miles through east and southeast Boise and surrounding areas to the Boise State University. Participants will then run 13.1 miles, most of which is along the Greenbelt, to the finish line at Julia Davis Park.

The BIKE ROUTE is as follows:

-      Begin at Lucky Peak Dam

-      North on Dam Road

-      Left on Highway 21

-      Left on Technology Way

-      Right on E. Circuit Lane

-      Left on Memory Road (becomes Technology Lane)

-      Left on S. Federal Way

-      Federal Way over the Interstate

-      Right on Eisenman Road

-      Left on Gowen Road

-      Left on Pleasant Valley Road

-      Right on Ten Mile Creek Road

-      U-turn at Ten Mile Creek and Hubbard Road

-      East on Ten Mile Creek Road

-      Right on S. Cole Road

-      U-turn at S. Cole Road and Kuna-Mora Road

-      North on S. Cole Road

-      Right on Ten Mile Creek Road

-      Right on Pleasant Valley Road

-      U-turn on Pleasant Valley Road and State Penitentiary

-      North on Pleasant Valley Road

-      Right on Gowen Road

-      Right on Eisenman Road

-      Left over the interstate

-      Left on Federal Way

-      Right on Technology Lane

-      Right on Circuit Lane

-      Left on Technology Way

-      Right on Highway 21

-      Left onto E. Warmsprings Road

-      Right into the transition area at East Jr. High

The RUN COURSE begins at East Jr. High. Runners will cross Warm Springs Avenue at the crosswalk and enter the greenbelt. The majority of the run course takes place on the greenbelt, and ends in Julia Davis Park.


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