Idaho Trail Ultra Series

There are now has 2 series you can join:  1: IDAHO TRAIL ULTRA SERIES (ITUS) - Finish 4 of the ultra distance events (>50K or 31 miles).  For times events and backyard ultra type events finish > 50K; 2: IDAHO TRAIL SERIES (ITS)-  Finish 4 of the sub-ultra distance events (between 10 miles and 30 miles). For times events and backyard ultra type events finish between 10 and 30 miles.

You can join one or both challenges!! Finishers of both series receive a custom award (Ultra Trail Challenge = running jacket and Trail Challenge = hoodie).  For each challenge there will be a point system and the top 6 females and top 6 men win a Dirty Dozen Award. You cannot combine ITUS and ITS races to get your 4 finishes.  You have to complete 4 ITUS events for and ITUS finish and 4 ITS races for a ITS finish.  However, you can do both independently and get both awards!!  

The ITUS and ITS both have 10 races races across Idaho from various race directors that offer some of the most amazing views and challenges to test your endurance, speed, and grit.

Points System:

• You accumulate points based on the distance and finish time of each race.  

• How are ITUS points configured?

  • We divide the winning time by runner time and then multiply by the applicable points for that race (e.g. 31 for 50k)

  • Bonus Points: 1st place -10 points; 2nd place -5 points; 3rd place -3 points. 2nd and 3rd place points are calculated on the formula BEFORE adding the bonus points. 

2026 ITUS: Click on race name to check out their websites.

January

Wilson Creek Frozen 50K: January 26

March

Pulse Endurance Runs 100M, 48HR/24HR/12HR/6HR (finish at least 31 miles in the time events). March 19-21

April

Spitfire 55K: April 18

Weiser River 50K: April 25

June

Scout Mountain Ultra Trail 100M, 50M, and 50K : June 5-6

River of no Return 108K and 55K: June 20

July

Beaverhead Endurance Runs 100K and 55K: July 11

Standhope Ultra Challenge 100M and 60K: July 24-26

September

If You're Not First You're Last (Complete at least 50k): September 12 

Bogus 50/50 (50M and 50K): September 28th 

2026 ITS: Click on race name to check out their websites.

January

Wilson Creek Frozen 10 mile and 20 Mile: January 26

March

Pulse Endurance Runs 48HR/24HR/12HR/6HR: March 19th-21st (finish between 10 and 30 miles): March 19-21

April

Spitfire 30K: April 18

June

Scout Mountain Ultra Trail 23M: June 7

River of no Return 32K: June 20

Dirty Dog Marathon and Half Marathon: June 14th

July

Standhope Ultra Challenge 30K: July 25

August

Outlaw Trail Ultra Half Marathon: August 8

September

If You're Not First You're Last (Finish between 10 and 30 miles): September 12

Bogus 50/50 27K: September 28th 

between 10 and 30 miles): January 8, 2027