See all January 2018 half marathons across the USA below, or click Race Calendars above to see each state’s calendar. For each race, you’ll find course maps, elevation profiles, reviews and info on how to register.
Monday, January 1
- Brazen New Year’s Day Half Marathon, 10K & 5K in Castro Valley, CA
- Chilly Willy Half Marathon & 5K in Seekonk, MA
- Clikapudi Trail Runs Half Marathon, 10K & 5K in Bella Vista, CA
- Deschutes River Half Marathon in Maupin, OR
- Hangover Half Marathon & 5K in Wichita, KS
- Happy New Year Marathon, Half Marathon, 10K & 5K in Long Beach, CA
- I Ran Marathons 12 Days of Christmas Series – Day 10 in San Antonio, TX
- Liberty Half Marathon in West Liberty, OH
- Metal Saw Texas Marathon & Half Marathon in Kingwood, TX
- New Years Double Marathon, Half Marathon & 5K in Allen, TX
- Polar Dash Half Marathon, 10K & 5K in St. Paul, MN
- Savage 7 Marathon & Half Marathon – Day 11 in Ocala, FL
Tuesday, January 2
- I Ran Marathons 12 Days of Christmas Series – Day 11 in San Antonio, TX
- Kicking off the New Year Marathon, Half Marathon, 15K, 10K & 5K in Long Beach, CA
- Savage 7 Marathon & Half Marathon – Day 12 in Ocala, FL
Wednesday, January 3
- I Ran Marathons 12 Days of Christmas Series – Day 12 in San Antonio, TX
- Savage 7 Marathon & Half Marathon – Day 13 in Ocala, FL
Thursday, January 4
- I Ran Marathons Winter Festival Series – Apollo in San Antonio, TX
Friday, January 5
- I Ran Marathons Winter Festival Series – Athena in San Antonio, TX
Saturday, January 6
- Citrus Heritage Run Marathon, Half Marathon & 5K in Riverside, CA
- Death Valley Half Marathon & 10K in Death Valley, CA
- Freeze Your Half Off – Saturday in Chattanooga, TN
- I Ran Marathons Winter Festival Series – Ares in San Antonio, TX
- Kick off the New Year Half Marathon, 15K, 10K & 5K in Long Beach, CA
- Newport Resolution Run & Polar Bear Plunge in Newport, OR
- Oregon Road Runners Club Y2K Half Marathon & 10K in Forest Grove, OR
- Red Nose Half Marathon in Columbus, GA
- River Road Run Half Marathon, 10K & 5K in New Braunfels, TX
- Run to Read Half Marathon in Fairmont, WV
- Swamp Forest Trail Marathon, Half Marathon & 6.5-Mile in Tallahassee, FL
- Walt Disney World Half Marathon in Lake Buena Vista, FL
- Watchung Run 50K, Marathon, Half Marathon & 10K in Mountainside, NJ
- Wild Azalea Trail Challenge in Alexandria, LA
- Winter Warrior Half Marathon in Rochester, NY
Sunday, January 7
- A New Year A New You Half Marathon, 15K, 10K & 5K in Santa Monica, CA
- Beachside Half Marathon & 5K in Vero Beach, FL
- Freeze Your Half Off – Sunday in Chattanooga, TN
- Herb Parsons Trail Marathon & Half Marathon in Collierville, TN
- I Ran Flagship Marathons Series – Bahrain in San Antonio, TX
- I Ran Marathons Winter Festival Series – Hera in San Antonio, TX
- River, Roots & Ruts Half Marathon in Alva, FL
- Spring Hill Marathon Mania in Spring Hill, FL
Monday, January 8
- I Ran Marathons Winter Festival Series – Aphrodite in San Antonio, TX
Tuesday, January 9
- I Ran Marathons Winter Festival Series – Poseidon in San Antonio, TX
Wednesday, January 10
- I Ran Marathons Winter Festival Series – Zeus in San Antonio, TX
Friday, January 12
- Rally in the Valley of Fire Half Marathon in Overton, NV
Saturday, January 13
- All-Out Polar Prowl Half Marathon, 10K & 5K in Arvada, CO
- Best Damn Race Jacksonville Half Marathon, 10K & 5K in Jacksonville, FL
- Charleston Marathon, Half Marathon, 5K & Bike Ride in Charleston, SC
- City of Delray Beach Half Marathon & 15K in Delray Beach, FL
- I Ran Flagship Marathons Series – Bangladesh in San Antonio, TX
- Museum of Aviation Marathon, Half Marathon & 5K in Warner Robins, GA
- Ocean Isle Beach Bridge Half Marathon, 10K & 5K in Ocean Isle Beach, NC
- Pacifica Foothills Trail Run in Pacifica, CA
- Pensacola Beach Run Half Marathon, 10K & 5K in Pensacola, FL
- Rally in the Valley of Fire Half Marathon in Overton, NV
- Resolution Run Half Marathon & 5K in McKinney, TX
- Rio Bravo Rumble Half Marathon, 10K & 5K in Bakersfield, CA
- Sorry ‘Bout That Half Marathon in Polson, MT
- Southern California Half Marathon & 5K in Irvine, CA
- St. George Half Marathon & 5K in St. George, UT
Sunday, January 14
- Brokeman’s Winter Warm Up Half Marathon, 8 Mile & 3.5 Mile in Columbus, OH
- Carlsbad Marathon & Half Marathon in Carlsbad, CA
- Cascade Half Marathon, 10K & 2 Mile in Turner, OR
- Chevron Houston Marathon & Aramco Half Marathon in Houston, TX
- First Light Marathon, Half Marathon & Fun Run in Mobile, AL
- Key West Half Marathon & 5K in Key West, FL
- Lions Fort Pierce Half Marathon & 5K in Fort Pierce, FL
- The Louisiana Marathon, Half Marathon, Quarter & 5K in Baton Rouge, LA
- Maui Oceanfront Marathon, Half Marathon, 15K, 10K & 5K in Lahaina, HI
- MLK Race for the Dream Marathon, Half Marathon & Bike Ride in Atlanta, GA
- Naples Daily News Half Marathon in Naples, FL
- Ocala Half Marathon & 5K in Ocala, FL
- Prairie Dog Half Marathon & 10K in Louisville, CO
- Rally in the Valley of Fire Half Marathon in Overton, NV
- Rock & Roll Arizona Marathon, Half Marathon & 10K in Tempe, AZ
- Shark Bite Half Marathon & 5K in New Smyrna Beach, FL
- St. Pete Beach Classic Half Marathon, 10K & 5K in St. Pete Beach, FL
- Star Wars Half Marathon – The Light Side in Anaheim, CA
- The Texas Half Marathon in Irving, TX
Thursday, January 18
- Aloha Marathon Series – Day 1 in Kapa’a, HI
Friday, January 19
- Aloha Marathon Series – Day 2 in Kapa’a, HI
Saturday, January 20
- Aloha Marathon Series – Day 3 in Kapa’a, HI
- Coyote Hills Half Marathon, 10K & 5K in Fremont, CA
- The Duel Marathon, Half Marathon & 10K in Wichita Falls, TX
- Elkmont’s Hound Dog Half Marathon in Elkmont, AL
- F^3 Lake Half Marathon in Chicago, IL
- Frost Eagle Half Marathon & 5 Mile in Sammamish, WA
- Frostbite Half Marathon, 10K & 5K in Starkville, MS
- Hot Cocoa Run Half Marathon, 10K & 5K in Eagle, ID
- Just ReRun Marathon, Half Marathon, 10K & 5K in Las Vegas, NV
- Oregon Winter Half Marathon & Quarter in Aloha, OR
- Pinehurt Half Marathon in Pinehurst, NC
- The Rain Run Half Marathon in Redmond, WA
- Topeka to Auburn Half Marathon in Topeka, KS
- The Urban Ultra 50K, Marathon, Half Marathon, 10K & 5K in Dallas, TX
- Winter Break Half Marathon, 15K, 10K & 5K in Long Beach, CA
- Winter Night Trail Half & Quarter Marathon in Indianapolis, IN
Sunday, January 21
- 3M Half Marathon in Austin, TX
- Aloha Marathon Series – Day 4 in Kapa’a, HI
- Arena Attack Indoor Race Series – Hartford in Hartford, CT
- Clearwater Distance Classic in Clearwater, FL
- I Ran Flagship Marathons Series – Barbados in San Antonio, TX
- Lake Mead Marathon, Half Marathon, 10K & 5K in Boulder City, NV
- McAllen Marathon & Half Marathon in McAllen, TX
- Pasadena Half Marathon & 5K in Pasadena, CA
- XTERRA Boney Mountain Half Marathon in Newbury Park, CA
Saturday, January 27
- Arches Ultra 50M, 50K, Half Marathon & 9K in Moab, UT
- Arizona Desert Classic Marathon, Half Marathon & 5K in Surprise, AZ
- Arizona Trail Oracle Rumble 50M, 50K, Half Marathon & 12K in Oracle, AZ
- Callaway Gardens Half Marathon in Pine Mountain, GA
- Cross Creek Ranch Dusk to Dawn Half Marathon in Fulshear, TX
- The Half Marathon at Pebble Beach in Del Monte Forest, CA
- I Ran Flagship Marathons Series – Belarus in San Antonio, TX
- Lake Benbrook Half Marathon & 5K in Benbrook, TX
- Mississippi Blues Marathon & Half Marathon in Jackson, MS
- PIBC Surf-N-Turf Half Marathon, 10K & 5K in Padre Island, TX
- Rotary Mission 10 Half Marathon, 10 Mile & 5K in San Juan Bautista, CA
- Securian Winter Run in St. Paul, MN
- Skydive Ultra Run in Clewiston, FL
- Southeast Alabama Community Foundation Half Marathon & 5K in Dothan, AL
- St. Louis Track Club Frostbite Series Half Marathon & 4-Mile in St. Louis, MO
- Tukwila To Alki Half Marathon in Tukwila, WA
- Viking Dash Half Marathon, 15K & 5K – Dallas in Rockwall, TX
- Winter Dragon Half Marathon, 10K & 5K in San Antonio, TX
- Yuma Territorial Marathon & Half Marathon in Somerset, AZ
Sunday, January 28
- The Big Beach Marathon & Half Marathon in Gulf Shores, AL
- Florida Challenge Trail Run Half Marathon & 5K in Lithia, FL
- Griffith Park Run Half Marathon & 5K in Los Angeles, CA
- Highland Y Run Half Marathon, 10K & 5K in Highland, CA
- Icebreaker International Marathon & Half Marathon in East Meadow, NY
- Miami Marathon & Half Marathon in Miami, FL
- Miracle Match Marathon, Ultra, Half Marathon & 10K in Waco, TX
- ONU Polar Bear Indoor Marathon & Half Marathon in Ada, OH
- Phoenix Women’s Half Marathon in Phoenix, AZ
- Too Cold to Hold Half Marathon, 10K & 5K in Dallas, TX
- Town of Celebration Marathon & Half Marathon in Celebration, FL
- USA Fit Marathon, Half Marathon & 5K in Sugar Land, TX
- Winter Fun Half Marathon, 15K, 10K & 5K in Santa Monica, CA
