Registration
Please visit the registration link to sign up: Spring Thaw Registration

Race Information

Choose from 1) LIVE 5K Run/Walk 2) LIVE 10K Run 3) VIRTUAL (Pick your distance, date and location)

Live races starts at 10 am

ONLINE REGISTRATION CLOSES Wednesday March 25th at 12 pm, after that time you can only register in person on race day between 8:30 am and 9:30 am. Raceday registrations will be $45 for either distance.

T-Shirts not guaranteed if not registered by March 10th at Midnight, there will not be a second shirt order.

Join Missouri River Runners for $15 for your entire household yearly membership (Jan 1 thru Dec 31, 2026).  Get $5 off EACH Spring Thaw 2026 race entry for your family!
Please register here first before completing your race entries:  http://getmeregistered.com/MRR

Note:  All membership discounts will be verified prior to picking up your packet.  No race entry transfers or refunds.

Peak Performance Packet Pickup: March 27th (Friday) 12 pm – 6 pm. (Peak Performance is located at 4501 Southern Hills Dr, Suite 19, Sioux City. Race Day (Saturday, March 28th) Packet Pickup:  8:30 am – 9:45 am The Hilton Garden Inn Sioux City Riverfront Lobby at 1132 Larsen Park Rd, Sioux City, IA.

After running, post a photo or video and share your virtual race experience on Missouri River Runner social media.

VIRTUAL PARTICIPANTS:
Run or walk your distance anywhere and anytime you choose: trail, sidewalk or treadmill! (Be sure to follow runner safety!)

After running, post a photo or video and share your virtual race experience on Missouri River Runner social media.

Packet Pickup
Peak Performance Packet Pickup: March 27th (Friday) 12 pm – 6 pm. (Peak Performance is located at 4501 Southern Hills Dr, Suite 19, Sioux City.

Race Day (Saturday, March 28th) Packet Pickup:  8:30 am – 9:45 am The Hilton Garden Inn Sioux City Riverfront Lobby at 1132 Larsen Park Rd, Sioux City, IA.

Awards
Overall Awards and age group medal winners will be presented for the LIVE Events only.

Overall Male, Overall Female, Masters Male, Masters Female

Age Group Categories:
14 & Under, 15-19, 20-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-64, 65-69, 70 & Over

Previous Race Results

2016
5K – Overall 5K – Age Groups 10 Mile – Overall 10 Mile – Age Groups

2017
5K – Overall 5K – Age Groups 10 Mile – Overall 10 Mile – Age Groups

2018
5K – Overall 5K – Age Groups 10 Mile – Overall 10 Mile – Age Groups

2019
5K – Overall 5K – Age Groups 10 Mile – Overall 10 Mile – Age Groups

2020
5K – Virtual 10M – Virtual

2021
5K – Overall 5K – Age Groups 5K – Virtual 10M – Virtual

2022
5K – Overall 5K – Age Groups 5K – Virtual 10M – Overall 10M – Age Groups 10M – Virtual

2023
5K – Overall 5K – Age Groups 10M – Overall 10M – Age Groups

2024
5K – Overall 5K – Age Groups 10M – Overall 10M – Age Groups

2025

Questions? Send a message to the race director!