See all March 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.
Thursday, March 1
- I Ran Marathons Seven Year Anniversary Series – Wood in San Antonio, TX
Saturday, March 3
- Best Damn Race Orlando Half Marathon, 10K & 5K in Orlando, FL
- Blood, Sweat & Beers Half Marathon in Boulder City, NV
- Crystal Coast Half Marathon, 10K & 5K in Morehead City, NC
- Diamond Valley Lake Marathon, Half Marathon, 5K & 1K in Hemet, CA
- Hypothermic Half Marathon in Rochester, MN
- I Ran Flagship Marathons Series – Bolivia in San Antonio, TX
- Liberty Hospital Half Marathon & 5K in Liberty, MO
- Myrtle Beach Marathon, Half Marathon, & 5K in Myrtle Beach, SC
- Run 4 Bibles Half Marathon, 10K, 5K & 1-Mile in Dallas, TX
- Run Hard Marathon, Half Marathon & 5K in Columbia, SC
- San Joaquin River Trail Half Marathon & 10K in Auberry, CA
- Tinajas Ultra Half Marathon, 100K, 50K & Relays in Bend, TX
- The Woodlands Marathon, Half Marathon, 5K & Relay in The Woodlands, TX
Sunday, March 4
- 13.1 Marathon Miami Beach in Miami, FL
- Alamo 13.1 Half Marathon & Relay in San Antonio, TX
- Chattanooga Marathon, Half Marathon & Relay in Chattanooga, TN
- Encinitas Half Marathon in Encinitas, CA
- Half at the Hamptons Half Marathon in Hampton Beach, NH
- Little Rock Marathon, Half Marathon & 10K in Little Rock, AR
- Livermore Half Marathon & 5K in Livermore, CA
- Marathon of the Treasure Coast Half Marathon in Jensen Beach, FL
- Ocean’s Run Marathon, Half Marathon & 4-Miler in Misquamicut, RI
- Rock ‘n’ Roll New Orleans Marathon, Half Marathon, 10K & 5K in New Orleans, LA
- Run Through Redlands Half Marathon, 10K & 5K in Redlands, CA
- St. Patrick’s Day Half Marathon & 5K in El Cajon, CA
- That Dam 13.1 & 5K Crush That Dam in Greenwood Village, CO
- Tucson Women’s Half Marathon, 10K & 5K in Tucson, AZ
- Zydeco Marathon & Half Marathon in Lafayette, LA
Saturday, March 10
- BB&T Corporate Cup Half Marathon & 5K in Charlotte, NC
- Berry Half Marathon, 10K & 5K in Rome, GA
- Cactus Classic Trail Race Marathon, Half Marathon & 10K in Manito, IL
- Chambersburg Half Marathon in Chambersburg, PA
- Daisy Mountain Half Marathon & Emma’s Run 5K in Anthem, AZ
- Divas Half Marathon & 5K in Peachtree City, GA
- Don’t Quit 13.1 in Dallas, TX
- Feed Stokes 5K & Half Marathon in King, NC
- Labor of Love Marathon, Half Marathon, 50M, 50K, 10K & 5K in Lovell Canyon, NV
- Montgomery Half Marathon & 5K in Montgomery, AL
- Rock ‘n’ Roll DC Marathon, Half Marathon & 5K in Washington, DC
- Starkey Wilderness Stomp Half Marathon, 10K & 5K in New Port Richey, FL
- ZOOMA Texas Half Marathon, 10K & 5K in Bastrop, TX
Sunday, March 11
- The Amazing Half Marathon in Baton Rouge, LA
- Arizona Distance Classic Half Marathon, Quarter Marathon & 5K in Oro Valley, AZ
- Celebrate Life Half Marathon in Rock Hill, NY
- E. Murray Todd Half Marathon in Lincroft, NJ
- Fall Creek Falls 50K & Half Marathon in Pikeville, TN
- Florida Beach Halfathon & 5K in Tierra Verde, FL
- I Ran Flagship Marathons Series – Bosnia and Herzegovina in San Antonio, TX
- Modesto Marathon, Half Marathon & 5K in Modesto, CA
- San Diego Half Marathon & 5K in San Diego, CA
- Tustin Hangar Half Marathon & 5K in Tustin, CA
- XTERRA Black Canyon Trail Run Half Marathon & 10K in Black Canyon City, AZ
Saturday, March 17
- Asheville Half Marathon at Biltmore Estate – Saturday in Asheville, NC
- Badger Cove Half Marathon, 10K & 5K in Livermore, CA
- Blue Angels Rock ‘n’ Fly Half Marathon & 5K in Pensacola, FL
- The Brooklyn Spring Half in Brooklyn, NY
- Canyonlands Half Marathon & 5-Mile Run in Moab, UT
- Grasslands Trail Run 50-Mile, Marathon & Half Marathon in Decatur, TX
- I Ran Flagship Marathons Series – Botswana in San Antonio, TX
- Maui Valley to the Sea Half Marathon, 10K & 5K in Wailuku, HI
- Mesquite Canyon Trail Half Marathon, 50M, 50K, 30K & 8K in Waddell, AZ
- Raccoon Mountain Marathon, Half Marathon & Relay in Chattanooga, TN
- Run to the Pub Half Marathon & 10K in Bozeman, MT
- Seabrook Lucky Trail Half Marathon & Relay in Seabrook, TX
- Shamrock Shuffle Half Marathon, 10K & 5K in Eagle, ID
- Spring Fling Trail Run Half Marathon in Alsea, OR
- St. Paddy’s Day Run Half Marathon, 10K & 5K in Tacoma, WA
- Wrightsville Beach Marathon & Half Marathon in Wrightsville Beach, NC
Sunday, March 18
- Adidas Shamrock Run Half Marathon, 15K, 8K, 5K & 1K in Portland, OR
- All-Out Spring Fever Half Marathon, 10K, 5K & 1-Mile in Golden, CO
- Asheville Marathon & Half Marathon at Biltmore Estate – Sunday in Asheville, NC
- Big D Marathon & Half Marathon in Dallas, TX
- Big Island International Marathon & Half Marathon in Hilo, HI
- First Watch Sarasota Half Marathon & Relay in Sarasota, FL
- Heavenly Half Marathon in Pine Ridge, CA
- Marco Island Half Marathon & 5K in Marco Island, FL
- Publix Georgia Marathon & Half Marathon in Atlanta, GA
- Seabrook Lucky Trail Half Marathon & Relay in Seabrook, TX
- Shamrock Marathon, Half Marathon & 8K in Virginia Beach, VA
- St. Paddy’s Memorial Hermann Sugar Land Half Marathon in Sugar Land, TX
- Tobacco Road Marathon & Half Marathon in Cary, NC
Saturday, March 24
- Alton Half Marathon & 5K in Alton, IL
- Bridge & Dam Half Marathon in Lake Ozark, MO
- Energy City Half Marathon, 10K, 5K & 1K in Midland, TX
- Go Girl Run Women’s Half Marathon & 5K in Oklahoma City, OK
- Great Race of Agoura Hills Half Marathons, 10K & 5K in Agoura Hills, CA
- Martinsville Half Marathon, 5K & Relay in Martinsville, VA
- Mile Run Trail Race in Allenwood, PA
- On the Run Half Marathon in Old Orchard Beach, ME
- Pride Run Phoenix Half Marathon, 10K & 5K in Phoenix, AZ
- Q50 Races Sunset Gulf Half Marathon in Grand Isle, LA
- Race for Women’s Wellness Half Marathon & 5K in Coral Springs, FL
- Ramblas Run Half Marathon, 10K & 5K in San Juan Capistrano, CA
- Riverton Half Marathon & 4Life 5K in Riverton, UT
- Sam Costa Half Marathon & Quarter Marathon in Carmel, IN
- San Felipe Shootout Half Marathon, 10K & 5K in San Felipe, TX
- Savin Rock Marathon & Half Marathon in West Haven, CT
- Shamrock Half Marathon in Manchester, NH
- Show the Trail Who’s Boss Half Marathon, Relay & 5K in Brownsville, TX
- Skidaway Island Marathon & Half Marathon in Savannah, GA
- Terrapin Mountain 50K & Half Marathon in Sedalia, VA
- Tomoka Marathon, Half Marathon & 5K in Ormond Beach, FL
- Two Rivers Marathon, Half Marathon, 10K & 5K – Day 1 in Lacawaxen, PA
- Wicked Marathon & Half Marathon in Wamego, KS
Sunday, March 25
- All-American Marathon & Mike-to-Mike Half Marathon in Fayetteville, NC
- Altis Marathon & Half Marathon in Houston, MS
- Ann Arbor Marathon, Half Marathon, 10K & 5K in Ann Arbor, MI
- Best Damn Race New Orleans Half Marathon & 5K in New Orleans, LA
- Covenant Health Knoxville Marathon, Half Marathon & 5K in Knoxville, TN
- Garden State Half Marathon, 10 Mile, 5K & Relay in Somerset, NJ
- Hellyer Half Marathon, 10K & 5K in San Jose, CA
- I Ran Flagship Marathons Series – Brazil in San Antonio, TX
- Love Run Philadelphia Half Marathon in Philadelphia, PA
- Mercer Island Half Marathon, 10K & 5K in Mercer Island, WA
- Oakland Running Festival Marathon, Half Marathon & 5K in Oakland, CA
- Reaching for the Cure Half Marathon, 10K, 5K & 1K in Irvine, CA
- Rock ‘n’ Roll Dallas Half Marathon in Dallas, TX
- Rock CF Rivers Half Marathon & 5K in Gross Ile, MI
- Sunrise Half Marathon in Sunrise, FL
- Tent City Marathon, Half Marathon, 10K & 5K in Atascadero, CA
- Two Rivers Marathon, Half Marathon, 10K & 5K – Day 2 in Lacawaxen, PA
Wednesday, March 28
- Dust Bowl Series Marathon, Half Marathon, 10K & 5K – Day 1 in Dalhart, TX
Thursday, March 29
Friday, March 30
- Dust Bowl Series Marathon, Half Marathon, 10K & 5K – Day 3 in Ulysses, KS
Saturday, March 31
- Carmel Marathon, Half Marathon, 8K & 5K in Carmel, IN
- Dust Bowl Series Marathon, Half Marathon, 10K & 5K – Day 1 in Lamar, CO
- Hoppin’ Half Marathon, 10K & 5K in Denver, CO
- Laughlin/Runnercard Half Marathon & 5K in Laughlin, NV
- Peace-Love-Run San Diego Half Marathon, 10K & 5K in San Diego, CA
- Run the Bluegrass Half Marathon in Lexington, KY
- Valencia Trail Race in Valencia, CA
