Races Opening in December

Ready for the best holiday season of all? Registration Season. 🎁

December is about to drop a ton of new 2026 races — and some of these will go faster than hot cocoa at an aid station on a cold morning.

December 1 kicks off a whole month of “OMG that race is finally open!” moments. So if you’ve been itching to plan next year’s adventures, lace up that trackpad finger… because December is coming in hot. 🔥

Below you’ll see a few of the races that are opening registration tomorrow, those that are opening throughout the month of December, and others that recently opened.

Opened December 1

Photo above: Mt. Spo Skimo

• Kettle Moraine LOTTERY | register | 6/13/26 | LaGrange, WI | 100 Mile, 100 Mile Relay, 100K, 38 Miler, 50K
• Walk in the Park | register | 9/6/26 | Kamloops, BC | 14K, 25K, 50K, 8K
• Wasatch 100 | register | 9/11/26 | Kaysville, UT | 100 Miler
• Terrapin Mountain | register | 3/21/26 | Sedalia, VA | 50K, Half-marathon
• Iron Legs Mountain Races | register | 8/8/26 | Calgary, AB | 100K, 25K, 50 Mile Relay 2 person, 50 Mile Relay 3 person, 50 Mile Solo, 60K
• Hawk Hundred | register | 9/12/26 | Lawrence, KS |
• Big Butts | register | 7/18/26 | Jackson, MS | 100K, 100K Relay, 25K, 50K
• Grasshopper Peak Redwoods Run | register | 6/6/26 | Weott, CA | 10.5 Miler, 30K
• Dead Horse Ultra | register | 11/14/26 | Moab, UT | 15K, 30K, 50 Miler, 50K
• Bobcat Trail Races | register | 10/17/26 | Colorado Springs, CO | 10K, 25K, 50K, 5K
• Iron Furnace Trail Run | register | 4/4/26 | McArthur, OH | 1/2 Marathon, 5 Mile
• Thunderbunny Trail Races | register | 5/9/26 | Athens, OH | 11K, 25K, 50K
• Gate2Gate Trail Run | register | 10/24/26 | Alachua, FL | 50K
• Continental Divide Trail Run | register | 8/29/26 | Steamboat Springs, CO | 16 Miler, 5 Miler, 50K
• Soup-In-The-Snow | register | 2/7/26 | Irwin, ID | 8.6 Miler
• The Stuffed Turkey Endurance Races | register | 11/21/26 | Granger, IA | 10 Miler, 100 Miler, 50 Miler, 50K
• White Pine 50 Backcountry Run | register | 8/15/26 | Garden City, UT | 50 Miler
• Kessel Run Ultra | register | 11/7/26 | Fruita, CO | 10 Miler, 20 Miler, 40 Miler, 50 Miler, 50K
• Sri Chinmoy 24 & 12-Hour, Midnight Marathon | register | 6/13/26 | Congers, NY | 12HR, 24HR, Midnight Mar., Sunset Half-Marathon
• Survivorfest Running Event | register | 6/12/26 | Sherwood Park, AB | 12HR-A, 12HR-B, 12HR-B Relay, 1600M (Ages 9-12), 2000M (Ages 13-17), 24HR-A, 24HR-B, 24HR-B Relay, 400M (Ages 4-8), 6HR-A 10AM, 6HR-A 2AM, 6HR-A 6PM, 6HR-B 10AM, 6HR-B 2AM, 6HR-B 6PM, 6HR-B Relay 10AM, 6HR-B Relay 6PM
• Great Shasta Rail Trail | register | 7/25/26 | McCloud, CA | 10K, 30K, 50K
• Miola Madness – Spring Into Daylight Savings | register | 3/14/26 | Paola, KS | 3hrs
• Last Buckeye Standing Backyard Ultra | register | 8/8/26 | Lewis Center, OH | Last Buckeye Standing
• Barn Creek Backyard Ultra | register | 11/6/26 | Jamestown, TN | Last Man Standing
• Two Prairies Ultra | register | 3/14/26 | Fort McCoy, FL | 30K, 50K
• Blue Ducky 5K Waddle | register | 5/16/26 | Springfield, LA | 5K, Virtual 5K
• Safe Animal Shelter Fundraiser Trail Run | register | 4/12/26 | Middleburg, FL | Big Dog 1/2 Marathon, Kitten 5K, Little Pup 10K
• Diablito 50/50 | register | 7/25/26 | Springfield, LA | 50 Miler, 50K
• Goat Rattler 100 | register | 9/18/26 | North Ogden, UT | GR100
• Heat Wave 6/12/24 | register | 6/12/26 | Rose Hill, KS | 12 Hours, 12 Hours – Night, 24 Hours, 6 Hours, 6 Hours – Night
• Mt. Spo Skimo | register | 3/15/26 | Spokane, WA |
• Andreas Ford Test Race | register | 6/12/26 | |
• Griffith Park Trail Marathon | register | 3/28/26 | Los Angeles, CA | 1/2 Marathon, 10K, 30K, 50K, Marathon
• Oregon Cascades 100 | register | 7/25/26 | Sisters, OR | 100 Miler, 50 Mile, Pacer
• Malibu Canyon Trail Races | register | 6/6/26 | Malibu, CA | 100K, 30K, 50 Mile, 50K, Half Marathon
• Hood Hundred | register | 8/1/26 | Mt. Hood, OR | 100 Miler
• Wy’east Wonder | register | 6/27/26 | Parkdale, OR | 50 Miler, 50K
• Wood You Rather | register | 5/16/26 | Portland, OR | 3 Person Team, 4 Person Team, 5 Person Team, 6 Person Team, 8 Miler
• Firelane Trail Trial | register | 5/2/26 | Portland, OR | Time Trial
• Yeti Ultra Trail Washington | register | 6/26/26 | Hyak, WA | 100 Miler, 100K
• Rim to River 100 | register | 10/24/26 | New River Gorge, WV | 100 Miler
• Prairie Chaos Backyard Ultra | register | 8/15/26 | Winnipeg, MB | Prairie Chaos Backyard Ultra

Opening Throughout December

Miler Run, 26 Miler Ski, 55 Mile Bike, 55 Mile Run, 55 Miler Ski

Opening 12/06/25 | Ouray 100 Mile Endurance Run | Register | 07/17/26 | Ouray, CO | 100 Miler

Opening 12/06/25 | Whiterock Ultra | Register | 07/25/26 | Coon Rapids, IA | 50 Miler, 50K

Opening 12/06/25 | Carolina Thread 8/4Hr | Register | 05/02/26 | Fort Mill, SC | 12hr, 4hrs, 8hr

Opening 12/06/25 | Old Tom Backyard | Register | 07/04/26 | Blumenort, MB | Last Runner Standing

Opening 12/07/25 | Tahoe Rim Trail Endurance Runs | Register | 07/18/26 | Carson City, NV | TRTER 100K, TRTER 100M, TRTER 50K

Opening 12/07/25 | Tahoe Rim Trail Endurance Runs | Register | 07/18/26 | Carson City, NV | 23K

Opening 12/07/25 | Copper Kings 100 | Register | 06/26/26 | Butte, MT | 100 Miler

Opening 12/08/25 | Sasquatch Shuffle TX | Register | 05/02/26 | Grapeland, TX |

Opening 12/08/25 | Duck River Trail Run 5K & 15K | Register | 03/28/26 | Columbia, TN | 15K, 5K

Opening 12/08/25 | The Broken Arrow Skyrace | Register | 06/18/26 | Lake Tahoe, CA | 11K, 18K, 23K, 46K, Iron Crown, Iron Face, Kids Run, the Ascent, Triple Crown

Opening 12/09/25 | Miller Mountain Trail Challenge | Register | 05/09/26 | Tunkhannock, PA | 25K, 25k Hike, 5 Mile

Opening 12/10/25 | SheVentures Camp | Register | 07/24/26 | Chattanooga, TN |

Opening 12/10/25 | Andreas Ford Test Race | Register | 06/12/26 | , |

Opening 12/10/25 | Clendening Half Marathon | Register | 02/21/26 | Freeport, OH | 13 Miler

Opening 12/14/25 | Cascade Crest | Register | 07/17/26 | Easton, WA | 100 Miler

Opening 12/14/25 | Crazy Mountain 100 | Register | 07/24/26 | Lennep, MT | 100 mile

Opening 12/14/25 | The Ripper – Sunrise to Sunset | Register | 05/02/26 | Pocomoke, MD | 14hrs

Opening 12/14/25 | Falling Water Ultras | Register | 04/25/26 | New River Gorge National Park, WV | 100K, 100K 2 Person Relay, 100K 4 Person Relay, 50K, Pacer

Opening 12/15/25 | Run for Kids Challenge | Register | 05/09/26 | Pelham, AL | 10K, 12hrs

Opening 12/15/25 | Tranquility Trail Run | Register | 03/07/26 | Pelham, AL | 3 Miler, 6 Miler

Opening 12/15/25 | Memorial Day Trail Run | Register | 05/23/26 | Pelham, AL | 12 Miler, 6 Miler

Opening 12/15/25 | Hotter N’ Hell Trail Run | Register | 07/25/26 | Pelham, AL | 18 Miler, 9 Miler

Opening 12/15/25 | Full Southeastern Trail Series – Long Series and Short Series | Register | 03/07/26 | Pellham, AL | Long Races, Short Races

Opening 12/15/25 | Ridge to Blazing Ridge Trail Race | Register | 08/22/26 | Pelham, AL | 10 Miler, 20 Miler

Opening 12/15/25 | Spaulding Woods 50K | Register | 07/11/26 | Northfield, NH | 50K

Opening 12/15/25 | Will Rogers 24 Hour/12 Hours/6 Hour | Register | 02/28/26 | Pacific Palisades, CA | 100 Mile, 10k, 12 Hour, 12 hour relay, 24 Hour, 24 hour relay, 30k, 50k, 6 hour, Half Marathon

• Opening 12/15/25 | Dinosaur Valley Endurance Run | Register | 11/21/26 | Glen Rose, TX | 100 Miler, 100K, 50K, Cretaceous 25K, Cretaceous 5 Mile, Jurassic 5 Mile, Mesozoic Maniac, Triassic 25K, Triassic 5 Mile
• Opening 12/16/25 | Sugg Farm Ultra | Register | 09/12/26 | Holly Springs, NC | 20 Miler, 40 Miler, 50 Miler, Pacer
• Opening 12/16/25 | Boulder Beast | Register | 09/19/26 | Lock Haven, PA | 24 Miler, 25K
• Opening 12/16/25 | Fire on the Rocks 10K | Register | 03/14/26 | McElhattan, PA | 10K
• Opening 12/16/25 | Climb It For Climate | Register | 08/16/26 | Highmount, NY | 25K, 8K
• Opening 12/16/25 | Hyner Half | Register | 08/22/26 | North Bend, PA | 14 Miler, 7K
• Opening 12/16/25 | Slate Run Trail Race | Register | 06/06/26 | Slate Run, PA | 25K, Slate Run Half
• Opening 12/16/25 | The View Trail Race | Register | 11/07/26 | North Bend, PA | 15K, 25K
• Opening 12/17/25 | Sasquatch Shuffle TX | Register | 05/02/26 | Grapeland, TX |
• Opening 12/18/25 | Call of the Wilds Mountain Fest | Register | 10/24/26 | Waterville, PA | 10K, 25K, 50K
• Opening 12/18/25 | Sproul 10k | Register | 06/20/26 | North Bend, PA | 10K, Sproul 5K
• Opening 12/19/25 | Dirt Circus – Los Angeles | Register | 03/21/26 | Los Angeles, CA |
• Opening 12/20/25 | Western States Training Camp – Memorial Weekend | Register | 05/23/26 | Foresthill, CA | Monday, Saturday, Sunday
• Opening 12/20/25 | Womp Romp | Register | 10/24/26 | Hingham, MA | 10 Miler, 50K
• Opening 12/20/25 | The Georgia Jewel | Register | 09/18/26 | Dalton, GA | 100 Miler, 18 Miler, 35 Miler, 50 Miler
• Opening 12/20/25 | Little Pine 5 Miler | Register | 10/25/26 | Waterville, PA | 5 Miler, 5 Miler–14 and Under
• Opening 12/21/25 | Carkeek 12 Hour | Register | 10/24/26 | Seattle, WA |
• Opening 12/21/25 | Cottontail 6 and 12 Hour | Register | 04/18/26 | Seattle, WA |
• Opening 12/21/25 | Sharlie Shuffle | Register | 06/06/26 | McCall, ID |
• Opening 12/21/25 | Sasquatch Shuffle | Register | 10/10/26 | McCall, ID |
• Opening 12/21/25 | Cottontail 6 and 12 Hour (Virtual) | Register | 04/01/26 | Virtual | 12 Hour – Virtual, 6 Hour – Virtual
• Opening 12/21/25 | Sharlie Shuffle (Virtual) | Register | 06/01/26 | Virtual | 12 Hour – Virtual, 6 Hour – Virtual
• Opening 12/21/25 | Sasquatch Shuffle (Virtual) | Register | 10/01/26 | | 20K – virtual, 30K – virtual, 50K – virtual
• Opening 12/21/25 | Carkeek 12 Hour (Virtual) | Register | 10/01/26 | Virtual | 12 Hour – Virtual, 6 Hour – Virtual
• Opening 12/21/25 | Summer Shuffle 12 Hour (Virtual) | Register | 07/01/26 | Virtual | 12 Hour – Virtual, 6 Hour – Virtual
• Opening 12/21/25 | Apex Aries | Register | 03/21/26 | Virtual | 12 Hours, 2 Hours, 24 Hours, 3 Hours, 4 Hours, 6 Hours, 60 Hours, 9 Hours
• Opening 12/21/25 | Endless Trails Series Registrations | Register | 03/21/26 | McCall, ID |
• Opening 12/21/25 | Gemini Guppie | Register | 05/21/26 | | Swim challenge
• Opening 12/21/25 | Notchview Ultra | Register | 07/10/26 | Windsor, MA | 100.7 Miles, 12hrs, 24hrs, 48hrs, 6hrs, 72Hrs
• Opening 12/22/25 | Western States Training Camp – Memorial Weekend | Register | 05/23/26 | Foresthill, CA | Monday, Saturday, Sunday
• Opening 12/25/25 | The Dizzy GOAT | Register | 06/27/26 | Omaha, NE | 12hrs, 3hrs, 6hrs
• Opening 12/26/25 | Morgan Hill Trail Races | Register | 09/19/26 | Fabius, NY | Half Marathon, Half Marathon Hike, Marathon
• Opening 12/26/25 | Nelson’s Summit 50/50 | Register | 10/24/26 | Salamanca, NY | 25km, 50 Miler, 50km
• Opening 12/26/25 | Hill to Hollow 100km | Register | 09/19/26 | Tully, NY | 100km Relay, 100km Solo
• Opening 12/26/25 | The 10k Classic Trail Run | Register | 03/15/26 | Albuquerque, NM | 10K
• Opening 12/27/25 | Trail Golf Endurance Challenge | Register | 06/27/26 | Valparaiso, IN |
• Opening 12/31/25 | Silver State | Register | 05/16/26 | Reno, NV | 1/2 Marathon, 50 Miler, 50K
• Opening 12/31/25 | Bay Area 100 Training Camp | Register | 04/17/26 | Berkeley, CA | Training Camp Saturday, Training Camp Sunday

Recently Opened Races

Races are opening daily!

Check out this list of Races that Opened in November →