Boulder Rez Half

USATF Certified

Saturday, April 11, 2026

Boulder, Colorado

USATFCourse

Course Information

USATF Certified Course

CO25001MWC · Expires 2035

Certified Course Name

Boulder Reservoir Half Marathon

Net Drop

0.00

m/km

Separation

0.0%

start to finish

This course is relatively flat with minimal net elevation change. Loop course — start and finish are close together.

View USATF Course Map (PDF)

Race Details

Race Day

Saturday, April 11, 2026

Course

Loop

Also Offers

10K5K run

Registration

Race Website

Official race information

Historical Weather

☀

Avg High

61°F

☽

Avg Low

33°F

☂

Precip

0.03 in

🍃

Wind

10.9 mph

46% humidity·Based on 5-year historical data

More races in Colorado

APR 4

Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA

APR 4

Always Hope Easter Run 5K/10K/13.1 DENVER/AURORA

APR 5

Three Creeks Half Marathon

APR 11

Run Through The Decades 6K/7K/8K/Half - Colorado Springs

Get notified about races in Colorado

New races, registration alerts, and insider tips from your State Guru.

We'll never share your email.

Course Information

USATF Certified Course

CO25001MWC · Expires 2035

Certified Course Name

Boulder Reservoir Half Marathon

Net Drop

0.00

m/km

Separation

0.0%

start to finish

This course is relatively flat with minimal net elevation change. Loop course — start and finish are close together.

View USATF Course Map (PDF)

Race Details

Race Day

Saturday, April 11, 2026

Course

Loop

Also Offers

10K5K run

Registration

Race Website

Official race information