26.2 miles13.1 miles6.2 miles3.1 milesVirtual - any distance!3.1 miles26.2 miles13.1 miles6.2 miles3.1 miles26.2 miles13.1 miles6.2 miles3.1 miles26.2 miles13.1 miles6.2 miles3.1 miles26.2 miles13.1 miles6.2 miles6.2 milesOpenSoleKIDs4,590 spots
City of Trees Marathon
Boise, Idaho
$75
Tier 4
35
Days Away
About This Race
Sunday, October 11, 2026
Course Maps will be updated once details have been finalized.
GREAT SWAG and T-SHIRT DEADLINE
Comfiest long sleeve t-shirt, swag thanks to our amazing sponsors, and finisher food/drink, all COT runners get a finisher's award. Please note that registrants registering after October 1, 2026 are not guaranteed a shirt.
Please note courses utilize the Boise Greenbelt system. Should we run the Greenbelt, the river can be unpredictable. Systems and entities that govern the local Greenbelt are constantly dealing with these challenges. Typical issues are created due to sidewalk construction, sinkholes, flooding, etc. During the run, you may encounter wildlife that may cause a delay in your progress and/or change in your planned route. Or you may cause your own delay to stop and listen to the amazing sounds this course creates.
Key Dates
Registration Opens
Invalid Date
Standard ends
Oct 14, 2022
Standard ends
Oct 14, 2022
Standard ends
Oct 14, 2022
Standard ends
Oct 14, 2022
Tier 1 ends
Aug 1, 2023
Tier 1 ends
Aug 1, 2023
Tier 1 ends
Sep 1, 2023
Tier 1 ends
Sep 1, 2023
Tier 2 ends
Sep 1, 2023
Tier 2 ends
Sep 1, 2023
Tier 3 ends
Oct 14, 2023
Tier 2 ends
Oct 14, 2023
Tier 2 ends
Oct 14, 2023
Tier 3 ends
Oct 14, 2023
Tier 1 ends
Apr 1, 2024
Tier 1 ends
Apr 1, 2024
Tier 1 ends
Jun 16, 2024
Tier 1 ends
Jun 16, 2024
Tier 2 ends
Jun 16, 2024
Tier 2 ends
Jun 16, 2024
Tier 2 ends
Jul 1, 2024
Tier 2 ends
Jul 1, 2024
Tier 3 ends
Jul 1, 2024
Tier 3 ends
Jul 1, 2024
Tier 3 ends
Aug 1, 2024
Tier 4 ends
Aug 1, 2024
Tier 4 ends
Aug 1, 2024
Tier 3 ends
Aug 1, 2024
Tier 4 ends
Sep 1, 2024
Tier 4 ends
Sep 1, 2024
Tier 5 ends
Sep 1, 2024
Tier 5 ends
Sep 1, 2024
Tier 5 ends
Oct 1, 2024
Tier 6 ends
Oct 1, 2024
Tier 5 ends
Oct 1, 2024
Tier 6 ends
Oct 1, 2024
Tier 7 ends
Oct 13, 2024
Tier 7 ends
Oct 13, 2024
Tier 6 ends
Oct 13, 2024
Tier 6 ends
Oct 13, 2024
Tier 1 ends
Dec 1, 2024
Tier 1 ends
Dec 1, 2024
Tier 1 ends
Dec 1, 2024
Tier 1 ends
Dec 1, 2024
Tier 2 ends
Mar 31, 2025
Tier 2 ends
Mar 31, 2025
Tier 2 ends
Jun 1, 2025
Tier 2 ends
Jun 1, 2025
Tier 3 ends
Jun 15, 2025
Tier 3 ends
Jun 15, 2025
Tier 3 ends
Jun 30, 2025
Tier 3 ends
Jun 30, 2025
Tier 4 ends
Jun 30, 2025
Tier 4 ends
Jun 30, 2025
Tier 5 ends
Aug 1, 2025
Tier 5 ends
Aug 1, 2025
Tier 4 ends
Aug 1, 2025
Tier 4 ends
Aug 1, 2025
Tier 6 ends
Sep 2, 2025
Tier 5 ends
Sep 2, 2025
Tier 6 ends
Sep 2, 2025
Tier 5 ends
Sep 2, 2025
Tier 7 ends
Sep 23, 2025
Tier 6 ends
Sep 23, 2025
Tier 7 ends
Sep 23, 2025
Tier 6 ends
Sep 23, 2025
Tier 7 ends
Oct 1, 2025
Tier 7 ends
Oct 1, 2025
Tier 8 ends
Oct 1, 2025
Tier 8 ends
Oct 1, 2025
Tier 9 ends
Oct 12, 2025
Tier 8 ends
Oct 12, 2025
Tier 9 ends
Oct 12, 2025
Tier 8 ends
Oct 12, 2025
Tier 1 ends
May 1, 2026
Tier 1 ends
May 1, 2026
Tier 1 ends
May 1, 2026
Tier 1 ends
May 1, 2026
Tier 2 ends
Jun 1, 2026
Tier 2 ends
Jun 1, 2026
Tier 2 ends
Jul 1, 2026
Tier 2 ends
Jul 1, 2026
Tier 3 ends
Jul 1, 2026
Tier 3 ends
Jul 1, 2026
Tier 4 ends
Aug 1, 2026
Tier 4 ends
Aug 1, 2026
Tier 3 ends
Sep 1, 2026
Tier 3 ends
Sep 1, 2026
Tier 5 ends
Sep 1, 2026
Tier 5 ends
Sep 1, 2026
Tier 6 ends
Oct 1, 2026
Tier 6 ends
Oct 1, 2026
Standard ends
Oct 5, 2026
Standard ends
Oct 10, 2026
Race Day
Oct 11, 2026
Tier 4 ends
Oct 11, 2026
Tier 4 ends
Oct 11, 2026
Tier 7 ends
Oct 11, 2026
Tier 7 ends
Oct 11, 2026
Registration Closes
Invalid Date
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Pricing
Current Price
$75
Tier 4
Ends
Oct 11, 2026
Price Progression
Standard
$45Jun 2, 2022
Standard
$85Jun 2, 2022
Standard
$55Jun 2, 2022
Standard
$65Jun 2, 2022
Tier 1
$55Dec 30, 2022
Tier 1
$45Dec 30, 2022
Tier 1
$65Dec 30, 2022
Tier 1
$85Dec 30, 2022
Tier 2
$75Aug 1, 2023
Tier 2
$95Aug 1, 2023
Tier 3
$85Sep 1, 2023
Tier 2
$55Sep 1, 2023
Tier 2
$65Sep 1, 2023
Tier 3
$105Sep 1, 2023
Tier 1
$95Dec 29, 2023
Tier 1
$75Dec 29, 2023
Tier 1
$45Dec 29, 2023
Tier 1
$65Dec 29, 2023
Tier 2
$85Apr 1, 2024
Tier 2
$105Apr 1, 2024
Tier 2
$55Jun 16, 2024
Tier 2
$75Jun 16, 2024
Tier 3
$95Jun 16, 2024
Tier 3
$115Jun 16, 2024
Tier 3
$65Jul 1, 2024
Tier 4
$125Jul 1, 2024
Tier 4
$105Jul 1, 2024
Tier 3
$85Jul 1, 2024
Tier 4
$95Aug 1, 2024
Tier 4
$75Aug 1, 2024
Tier 1
$45Aug 1, 2024
Tier 5
$115Aug 1, 2024
Tier 1
$35Aug 1, 2024
Tier 5
$135Aug 1, 2024
Tier 1
$25Aug 1, 2024
Tier 1
$55Aug 1, 2024
Tier 5
$85Sep 1, 2024
Tier 6
$145Sep 1, 2024
Tier 5
$105Sep 1, 2024
Tier 6
$125Sep 1, 2024
Tier 7
$135Oct 1, 2024
Tier 7
$155Oct 1, 2024
Tier 6
$115Oct 1, 2024
Tier 6
$95Oct 1, 2024
Tier 2
$95Dec 1, 2024
Tier 2
$75Dec 1, 2024
Tier 2
$45Dec 1, 2024
Tier 2
$65Dec 1, 2024
Tier 3
$85Mar 31, 2025
Tier 3
$105Mar 31, 2025
Tier 3
$75Jun 1, 2025
Tier 3
$55Jun 1, 2025
Tier 4
$115Jun 15, 2025
Tier 4
$95Jun 15, 2025
Tier 5
$105Jun 30, 2025
Tier 5
$125Jun 30, 2025
Tier 4
$85Jun 30, 2025
Tier 4
$65Jun 30, 2025
Tier 6
$95Aug 1, 2025
Tier 5
$45Aug 1, 2025
Tier 6
$105Aug 1, 2025
Tier 5
$65Aug 1, 2025
Tier 7
$85Sep 2, 2025
Tier 6
$35Sep 2, 2025
Tier 7
$55Sep 2, 2025
Tier 6
$45Sep 2, 2025
Tier 7
$45Sep 23, 2025
Tier 7
$55Sep 23, 2025
Tier 8
$105Sep 23, 2025
Tier 8
$115Sep 23, 2025
Tier 9
$115Oct 1, 2025
Tier 8
$45Oct 1, 2025
Tier 9
$125Oct 1, 2025
Tier 8
$65Oct 1, 2025
Tier 1
$35Nov 19, 2025
Tier 1
$45Nov 19, 2025
Tier 1
$55Nov 20, 2025
Tier 1
$65Nov 20, 2025
Standard
$45Mar 16, 2026
Tier 2
$75May 1, 2026
Tier 2
$45May 1, 2026
Tier 2
$55May 1, 2026
Tier 2
$65May 1, 2026
Tier 3
$85Jun 1, 2026
Tier 3
$75Jun 1, 2026
Tier 3
$65Jul 1, 2026
Tier 3
$55Jul 1, 2026
Tier 4
$85Jul 1, 2026
Tier 4
$95Jul 1, 2026
Tier 5
$95Aug 1, 2026
Tier 5
$105Aug 1, 2026
Standard
$20Aug 13, 2026
Tier 4
$75Sep 1, 2026
Tier 4
$60Sep 1, 2026
Tier 6
$115Sep 1, 2026
Tier 6
$105Sep 1, 2026
Tier 7
$125Oct 1, 2026
Tier 7
$110Oct 1, 2026
Race Planning
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