Half Boulder 15K

Description & Location

The 15 kilometer Half Boulder begins on the second half of the Boulder Mountain Tour course at Baker Creek. The Half merges with the late waves of the BMT and finishes at the SNRA Headquarters. The gently rolling terrain of the Half Boulder makes it a perfect introduction for the first time racer.

The HALF is designated as a skate race, but a track is set the length of the course and classic skiers are welcome. Classic skiers are timed as skate competitors.


The Half Boulder is limited to 200 registered racers.
Special combo entry for adults skiing with children 10 and under.
Registration will officially close on Wednesday, January 31, 2018 at 9pm.
No race day registration. No exceptions.
There are NO REFUNDS FOR ANY REASON, even if race is cancelled.

Trail Pass info

Present your 2018 Half BMT race entry at any of the following local merchants and receive 4 FREE days of skiing from February 1 – February 4 with your BOULDER PASS:

  • Backwoods Mountain Sports
  • The Elephant’s Perch
  • Sturtevants
  • Galena Lodge
  • Paper or electronic receipts accepted.

The Boulder Pass gives you access to over 200 kilometers of Nordic trails in and around the valley. Our meticulously groomed trails are managed and maintained by the Blaine County Recreation District.
(ADD LINK to BCRD Wintertrails page)


Family and Friends may purchase the unrestricted $49 NORDIC FESTIVAL TRAIL PASS, valid from January 27 – February 4, 2018. NFTP holders will also have access to an additional 41 km of trails at the Sun Valley Nordic Center, in Sun Valley. This pass is available for purchase at the merchants listed above as well as Sun Valley Nordic Center.

Friday Inspection

The course will be open for inspection on Friday, February 2nd until 4:00 pm.
BOULDER PASS will be required on the trails.

Race Packet Pickup

Friday, Feb 2, 2018, 10:00am – 8:00 pm.
Ketchum Innovation Center, aka KIC
311 1st Ave N, downtown Ketchum

Pick up your race packet and browse the Boulder Mountain Tour Expo,
featuring over 20 local vendors and event sponsors eager to share their knowledge about the latest products.

If you are arriving in town after 8:00pm, please contact the Race Director at to make special arrangements or ask a friend to pick up your packet for you. Please supply them with a signed note granting your permission.

Saturday Bus Transportation – 10:30am – 11:00am

Buses will transport racers and spectators from Hemingway Elementary School, located on 8th St in Ketchum, to the Half Boulder start at Baker Creek.


Buses departing for Galena between 7:00am and 9:15am will not stop at Baker Creek for the Half Boulder start. The early buses are for the full BMT racers and spectators only.

Return shuttles from the Finish to Hemingway school will begin at 12:00 noon and run every 20 minutes until 4:00pm.

Clothing Transport from Start to Finish

Your BMT souvenir race bag should be used for warm up and post race clothing.
Clothing and ski bags must be clearly labeled with your name and bib number to be transported to the finish area by the race organization.
Make sure all of your belongings are inside the bag before heading to the start line.
Please leave race bags at the designated area at the start. You will easily be able to locate your gear at the finish.

Start information

The Half Boulder starts as a single wave at approximately 11:30 am or once the majority of full BMT racers have passed Baker creek.
As with all mass starts, faster skiers will be at the front. Place yourself according to your ability.

Aid Stations & Cut Off Times

Station and km Location Name Cut-off Time
Aid Station #1 @ 3km Cathedral Pines 1:30 pm
Aid Station #2 @ 8km Frostbite Flats 2:30 pm
Finish SNRA 4:00 pm

Hot soup, bread, drinks and cookies for all racers at the Finish.
A warming tent may be provided if the weather is unfavorable.


Unofficial times will be posted at the finish area as soon as they are processed. Official results will be posted to the website and available for viewing at the Awards Ceremony Saturday night.

Awards Ceremony: Saturday, February 3, 5:30pm – 7:00pm

Limelight Room – Sun Valley Inn, in Sun Valley.
Medals presented to the top 3 male and female in each age class.
All race participants will receive a raffle ticket at the door. Raffle prizes include skis, boots, poles, clothing, bags and training aids from our generous sponsors and supporters.
You must be present to win!