Experience the thrilling ascent of the Boise Twilight Hill Climb, set against the backdrop of Idaho’s breathtaking landscapes. This unique race offers runners an unforgettable challenge through diverse terrain and stunning views that span from dry creek trails to towering rock formations. The pre-race training series, organized by George's Cycles RF Foundations Race team, kicks off on June 13th with A Group and B Group sessions at the downtown location of George’s Cycles. Each Saturday, B Group participants will progressively increase their mileage, starting from a manageable four miles near Dry Creek Trailhead to an exhilarating sixteen-mile journey up to Simplot Lodge by July 4th. A Group riders will tackle the climb based on road conditions—continuing as far as the terrain becomes wet or snow-covered each week. The ride leader will move among participants, ensuring safety and support throughout the training sessions. After reaching eight miles, regrouping at water drops will occur when temperatures rise to ensure a comfortable pace. On race day, gather at Harrison Hollow Park for packet pickup from Thursday evening until Friday before the event. George's tent will also be present during the Boise Twilight Criterium on the corner of Jefferson and 6th Street if you miss initial pick-up opportunities. Race morning begins early with an assembly line forming by 7:45 AM, followed closely by a mass start at approximately 7:50 AM to ensure runners hit the climb precisely when it opens at 8 AM. The route climbs steeply past Curling, offering both exhilarating views and challenging ascents. For those who complete before 10 AM, remain atop the mountain until this time for safety reasons; traffic control measures will be in place during this period. At 10 AM, you are free to descend or explore the lower lodge area without crossing back over the finish line. The race concludes at Pioneer Lodge’s upper level, where a festive atmosphere awaits with cones marking the official finish line. Medical support and aid stations positioned along the route will ensure your safety throughout the climb. Compete for bragging rights in this fun, non-competitive event that rewards top performers across age groups while offering podium honors to men and women overall. Whether you are a seasoned climber or new to such challenges, the Boise Twilight Hill Climb promises an experience filled with adventure and camaraderie.
Races Offered
Men 18 and Under
Jul 12, 2026
straighten
Distance —
29K
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Type —
Cycling
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9 days remaining
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$45.00
Men 23-34
Jul 12, 2026
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Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
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$55.00
Men 35-44
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Men 45-54
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Men 55-64
Jul 12, 2026
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Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
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$55.00
Men 65-69
Jul 12, 2026
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Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
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$50.00
Men 70+
Jul 12, 2026
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Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Men E-Bike (Class 1 - Pedal Assist - No Throttles) Any Age
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Men U23
Jul 12, 2026
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Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$45.00
Non-Binary any age
Jul 12, 2026
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Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Single Speed
Jul 12, 2026
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Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Women 18 and Under
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$45.00
Women 18-23
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$45.00
Women 23-34
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Women 35-44
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Women 45-54
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Women 55-64
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Women 65-69
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Women 70+
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Women E-Bike (Class 1 - Pedal Assist - No Throttles) Any Age
Jul 12, 2026
straighten
Distance —
29K
terrain
Type —
Cycling
timer
9 days remaining
sell
$55.00
Weather History
These values represent the 3-year monthly averages for July in Boise.
thermostatTemperature
18.5° / 35.0°
wb_sunnyFeels like
16.6° / 31.2°
light_mode
Avg sunshine hours
13h 47m
water_drop
Avg rainfall
0.1 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
8.8 km/h (Light breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Hard and dry surface
sunny
Max UV Index
Very High (8.0)
humidity_mid
Humidity
26.5%
wb_twilight
Sunrise
06:19
nightlight
Sunset
21:21
About Boise
Learn more about the host city, Boise.
Boise is the capital and largest city of Idaho. Boise offers numerous recreational opportunities, including extensive hiking and biking in the foothills to the immediate north of downtown. Boise is a regional hub for jazz, theater, and indie music, and is home to several museums.
