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
- Albany Snickers Marathon & Half Marathon in Albany, GA
- Best Damn Race Orlando Half Marathon, 10K & 5K in Orlando, FL
- Bidwell Classic Half Marathon, 5K & Relay in Chico, CA
- Blood, Sweat & Beers Half Marathon in Boulder City, NV
- Blue Angels Half Marathon & 10K in El Centro, CA
- Champoeg 30K, Half Marathon & 10K in St. Paul, OR
- Crystal Coast Half Marathon, 10K & 5K in Morehead City, NC
- Diamond Valley Lake Marathon, Half Marathon, 5K & 1K in Hemet, CA
- Dirty Hurty Half Marathon in Ivins, UT
- DreamCatcher Half Marathon in Grand Junction, CO
- Griffith Park Trail Race 50K, Marathon & Half Marathon in Los Angeles, CA
- The Gusher Marathon, Half Marathon & 5K in Beaumont, TX
- Hypothermic Half Marathon in Rochester, MN
- I Ran Flagship Marathons Series – Bolivia in San Antonio, TX
- Lantern Run Half Marathon, 10K & 5K in San Francisco, CA
- Liberty Hospital Half Marathon & 5K in Liberty, MO
- March Madness Half Marathon, 10K & 5K in West Bountiful, UT
- March Madness Marathon, 3/4 Marathon, Half Marathon, 15K, 10K & 5K in Long Beach, CA
- Mountain Marathon & Hillbilly Half Marathon in Olympia, WA
- Myrtle Beach Marathon, Half Marathon, & 5K in Myrtle Beach, SC
- Parade Day Half Marathon & 5K in Rockaway Park, NY
- Peak Snow Devil Winter Race in Pittsfield, VT
- 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
- Singletrack Stampede in Calabasas, CA
- Sledge Trail Run Half Marathon, 10K & 5K in Danville, VA
- Snake River Canyon Half Marathon in Pullman, WA
- Sunset Half Marathon, 10K & 5K in Seattle, WA
- Tinajas Ultra Half Marathon, 100K, 50K & Relays in Bend, TX
- Tom King Classic Half Marathon & 5K in Nashville, TN
- Trinity River Levee Run in Dallas, TX
- VeteRun Half Marathon & 5K in Summit Point, WV
- Wallace Falls Trail Run in Gold Bar, WA
- Warrior Half Marathon, 10-Mile & 5K in Sevierville, TN
- Winter Trail Fest 13.1 in Middleville, MI
- The Woodlands Marathon, Half Marathon, 5K & Relay in The Woodlands, TX
- Xpress Half Marathon in Wichita Falls, TX
Sunday, March 4
- 305 Half Marathon & 5K in Miami, FL
- Alamo 13.1 Half Marathon & Relay in San Antonio, TX
- Chattanooga Marathon, Half Marathon & Relay in Chattanooga, TN
- Cruise the Marina Marathon, Half Marathon, 10K & 5K in Long Beach, CA
- E. Murray Todd Half Marathon in Lincroft, NJ
- Encinitas Half Marathon in Encinitas, CA
- Fort Myers Half Marathon & 5K in Fort Myers, FL
- Hampton Half Marathon & 5K in Hampton Beach, NH
- Lincoln City Half Marathon & 10K in Lincoln City, OR
- Little Rock Marathon, Half Marathon & 10K in Little Rock, AR
- Livermore Half Marathon & 5K in Livermore, CA
- Long Play Race 33 1/3 Mile, Marathon & Half Marathon in Brooksville, FL
- Marathon of the Treasure Coast Half Marathon in Jensen Beach, FL
- Mill Creek Distance Classic Half Marathon & 5K in Youngstown, OH
- Moab Spring Trail Run in Moab, UT
- Ocean’s Run Marathon, Half Marathon & 4-Miler in Misquamicut, RI
- Palmetto Bluff Half Marathon & 10K in Bluffton, SC
- Quivering Quads Trail Half Marathon in Troy, MO
- River Roots & Ruts Trail Run in Alva, FL
- Rock ‘n’ Roll New Orleans Marathon, Half Marathon, 10K & 5K in New Orleans, LA
- Run Through Redlands Half Marathon, 10K & 5K in Redlands, CA
- Santa Cruz Half Marathon, 10K & 5K in Santa Cruz, CA
- Seaside School Half Marathon & 5K in Seaside, FL
- 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
- Beach Bash Half Marathon, 15K, 10K & 5K in Long Beach, CA
- 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
- Crazy Desert Trail Race in San Angelo, TX
- 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
- Emerald Isle Marathon, Half Marathon & 5K in Emerald Isle, NC
- Feed Stokes 5K & Half Marathon in King, NC
- Labor of Love Marathon, Half Marathon, 50M, 50K, 10K & 5K in Lovell Canyon, NV
- Lake Sammamish Half Marathon in Sammamish, WA
- Lucky 13.1 Half Marathon & 5K in Peculiar, MO
- Lucky Leprechaun Half Marathon, 10 Miler & 5K in Versailles, KY
- Mo Marathon & Half Marathon in Perrysville, OH
- Montgomery Half Marathon & 5K in Montgomery, AL
- NYCRUNS Frozen Penguin Half Marathon in Brooklyn, NY
- Old West Trails 50K & Half Marathon in Julian, CA
- Orange Blossom Half Marathon, 10K & 5K in Haines City, FL
- Pi Day River Rotation Marathon, Half Marathon & 5K in Lawrence, KS
- Race the Bay Marathon, Half Marathon, 10K & 5K in Long Beach, CA
- Rock ‘n’ Roll DC Marathon, Half Marathon & 5K in Washington, DC
- Run for the Bridges Half Marathon & 10K in Lincoln, NE
- Run Through Time Marathon, Half Marathon & 2 Mile Fun Run in Salida, CO
- SP Crater Marathon, Half Marathon, 10K & 5K in Flagstaff, AZ
- Starkey Wilderness Stomp Half Marathon, 10K & 5K in New Port Richey, FL
- Talimena Half Marathon Run & Relay in Mena, AR
- Tell City Half Marathon in Tell City, IN
- Vike Hike Half Marathon & 5K in Poteau, OK
- 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
- Crush the Coast Marathon, 3/4 Marathon, Half Marathon, 15K, 10K & 5K in Long Beach, CA
- 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
- MudDogs Half Marathon, 10K & 5K in Mt. Pleasant, MI
- San Diego Half Marathon & 5K in San Diego, CA
- San Marbellus Run Half Marathon, 10K & 5K in San Marcos, TX
- Shamrock’n Half Marathon in Sacramento, CA
- St. Patrick’s Day Half Marathon, 10K & 5K in Snellville, GA
- Tustin Hangar Half Marathon & 5K in Tustin, CA
- Undiscovered Half Marathon, Full Marathon, Quarter Marathon & 50K in Columbus, OH
- 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
- The Blarney Stone Half Marathon, 10K & 5K in Potterville, MI
- Blue Angels Rock ‘n’ Fly Half Marathon & 5K in Pensacola, FL
- Brew-2-Brew St. Patrick’s Day Half Marathon in Vero Beach, FL
- The Brooklyn Spring Half in Brooklyn, NY
- Canyonlands Half Marathon & 5-Mile Run in Moab, UT
- Chicago Get Lucky Half Marathon, 14K & 7K in Chicago, IL
- City of Seneca Half Marathon & 5K in Seneca, SC
- Folsom South Side Trail Run in Folsom, CA
- Grasslands Trail Run 50-Mile, Marathon & Half Marathon in Decatur, TX
- Heels Up Half in Shreveport, LA
- I Ran Flagship Marathons Series – Botswana in San Antonio, TX
- Kiss Me I’m Irish Half Marathon in Glendale, AZ
- Marana-Tucson Shamrock Half Marathon, 10K & 5K in Tucson, AZ
- Maui Valley to the Sea Half Marathon, 10K & 5K in Wailuku, HI
- Mesquite Canyon Trail Half Marathon, 50M, 50K, 30K & 8K in Waddell, AZ
- Midsouth Runners Half Marathon & 5K in Olive Branch, MS
- Music City Half Marathon, 10K & 5K in Nashville, TN
- Napa Valley Trail Marathon, Half Marathon & 10K in Calistoga, CA
- O’Round the Loch Run Half Marathon, 10K, 5K & 1.7-Mile in Emmetsburg, IA
- Pocahontas Trail Fest in Chesterfield, VA
- Raccoon Mountain Marathon, Half Marathon & Relay in Chattanooga, TN
- Rock the Bayshore Marathon, 3/4 Marathon, Half Marathon, 15K, 10K & 5K in Long Beach, CA
- Run to the Pub Half Marathon & 10K in Bozeman, MT
- Running the Shoals Marathon & Half Marathon in Muscle Shoals, AL
- Saint Patrick’s Day Run Fest in Hagerstown, MD
- Scotty’s Shamrock Shuffle Half Marathon, 10K & 5K in Muncie, IN
- Seabrook Lucky Trail Half Marathon & Relay in Seabrook, TX
- Shamrock Shuffle Half Marathon, 10K & 5K in Eagle, ID
- Shamrock Shuffle Half Marathon & 5K in Harmony, PA
- Singer Island Half Marathon in Riviera Beach, FL
- Six Tunnels to Hoover Dam Half Marathon, 12K, 5K & 1-Mile in Boulder City, NV
- Spring Fling Trail Run Half Marathon in Alsea, OR
- St. Paddy’s Day Run Half Marathon, 10K & 5K in Tacoma, WA
- Sunset Half Marathon – NYC in Brooklyn, NY
- 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
- Altis Marathon & Half Marathon in Houston, MS
- Asheville Marathon & Half Marathon at Biltmore Estate – Sunday in Asheville, NC
- Big Island International Marathon & Half Marathon in Hilo, HI
- Bolingbrook St. Paddy’s Half Marathon & 5K in Bolingbrook, IL
- Caesar Rodney Half Marathon, Relay & 5K in Wilmington, DE
- First Watch Sarasota Half Marathon & Relay in Sarasota, FL
- Go Green St. Patrick’s Day Half Marathon, 10K & 5K in San Jose, CA
- Heavenly Half Marathon in Pine Ridge, CA
- Marco Island Half Marathon & 5K in Marco Island, FL
- March Madness Half Marathon in Cary, IL
- Marina Madness Marathon, Half Marathon, 10K & 5K in Long Beach, CA
- Mercer Island Half Marathon, 10K & 5K in Mercer Island, WA
- New Bedford Half Marathon in New Bedford, MA
- No Luck Irish Run Half Marathon & 5K in Plainfield, IN
- Phoenix Shamrock Half Marathon, 10K & 5K in Gilbert, AZ
- 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
- St. Patty’s Recovery Run Half Marathon & 5K in Washington, DC
- Tobacco Road Marathon & Half Marathon in Cary, NC
- United Airlines NYC Half Marathon in New York, NY
- Wine Country Runs Half Marathon & 5K in Paso Robles, CA
Wednesday, March 21
- Chili Pepper Series – Day 1 in Las Cruces, NM
Thursday, March 22
- Chili Pepper Series – Day 2 in Las Cruces, NM
Friday, March 23
- Chili Pepper Series – Day 3 in Las Cruces, NM
Saturday, March 24
- A Pot of Gold Shared Half Marathon & 5K in University Park, IA
- Alton Half Marathon & 5K in Alton, IL
- Beach Dash Half Marathon, 15K, 10K & 5K in Long Beach, CA
- Bearathon Half Marathon & 5K in Waco, TX
- Beaufort Twilight Run in Beaufort, SC
- Bridge & Dam Half Marathon in Lake Ozark, MO
- CASA Superhero Run in Ratcliff, TX
- Chili Pepper Series – Day 4 in Las Cruces, NM
- Dash Point State Park Half Marathon & 10K in Federal Way, WA
- Dick Lytie Classic in Green Bay, WI
- Doc Lopez Run for Health in Elizabethtown, NY
- Energy City Half Marathon, 10K, 5K & 1K in Midland, TX
- Flora-Bama’s Beach Run/Walk for America’s Warriors Half Marathon & 5K in Perdido Key, FL
- 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
- Knickerbocker Canyon Trail Run in Auburn, CA
- Marina Mania Marathon, Half Marathon, 10K & 5K in Long Beach, CA
- Martinsville Half Marathon, 5K & Relay in Martinsville, VA
- Mile Run Trail Race in Allenwood, PA
- Neuse River Bridge Run Half Marathon, 10K & 5K in New Bern, NC
- New South Trail Marathon & Half Marathon in Charlotte, NC
- NYCRUNS Ladies First Half Marathon in Brooklyn, NY
- On the Run Half Marathon in Old Orchard Beach, ME
- OPSF50|50 14-Mile, 50K & 50-Mile in Poland, IN
- Owyhee Off-Road Challenge Half Marathon, 10K & 5K in Adrian, OR
- Pride Run Phoenix Half Marathon, 10K & 5K in Phoenix, AZ
- Q50 Races Sunset Gulf Half Marathon in Grand Isle, LA
- Rabbit Chase Half Marathon, 10K & 30K in Stinson Beach, CA
- 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
- Run & Walk For Children Half Marathon & 5K in Bowling Green, KY
- Salomon San Francisco Half Marathon, 10K & 5K in San Francisco, CA
- 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
- Sleepy Hollow Half Marathon in Sleepy Hollow, NY
- Southern Illinois Spring Classic Half Marathon & 5K in Lawrenceville, IL
- Sunset Half Marathon & 5K in Dallas, TX
- Terrapin Mountain 50K & Half Marathon in Sedalia, VA
- Three Creeks Half Marathon, 10K & 5K in Groveport, OH
- Tomoka Marathon, Half Marathon & 5K in Ormond Beach, FL
- Tour de Glen Rose Half Marathon & 5K in Glen Rose, TX
- Trail Trashed 50M, Marathon, Half Marathon, 10K, 5K & 1-Mile in Henderson, NV
- Tuscaloosa Half Marathon & 5K in Tuscaloosa, AL
- Two Rivers Marathon, Half Marathon, 10K & 5K – Day 1 in Lacawaxen, PA
- Viking Half Marathon & 5K in Greenwood, MS
- Vortex Half Marathon & 10K Trail Run in Estacada, OR
- Wicked Marathon & Half Marathon in Wamego, KS
Sunday, March 25
- A2A Race for Mercy Marathon, Half Marathon & 5K in Ardmore, OK
- All-American Marathon & Mike-to-Mike Half Marathon in Fayetteville, NC
- Baker’s Dozen Half Marathon in Montclair, NJ
- Best Damn Race New Orleans Half Marathon & 5K in New Orleans, LA
- Blast the Oceanfront Marathon, 3/4 Marathon, Half Marathon, 15K, 10K & 5K in Long Beach, CA
- Cottontail Half Marathon, 10K & 5K in Van Nuys, CA
- Covenant Health Knoxville Marathon, Half Marathon & 5K in Knoxville, TN
- Cupcake Runs Marathon & Half Marathon in Arlington, WA
- Dolphin Dash Half Marathon, 15K, 10K & 5K in Santa Monica, CA
- 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
- 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
- Rosaryville Half Marathon & 10K in Upper Marlboro, MD
- Run for the Border Half Marathon in Rye, NH
- Sachuest Point Marathon, Half Marathon, 10K & 5K in Middletown, RI
- Spring Equinox Half Marathon in Fort Collins, CO
- 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
- West Point Fallen Comrades Half Marathon in West Point, NY
- Windward Half Marathon & 5K in Kailua, HI
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
- Beachmania Marathon, 3/4 Marathon, Half Marathon, 15K, 10K & 5K in Long Beach, CA
- Carmel Marathon, Half Marathon, 8K & 5K in Carmel, IN
- Dust Bowl Series Marathon, Half Marathon, 10K & 5K – Day 4 in Lamar, CO
- Duxbury Half Marathon in Duxbury, MA
- Easter Egg Stash Dash Half Marathon & 5K in Eugene, OR
- First Call Half Marathon & 5K in Waukesha, WI
- Golden Gate Headlands Marathon, Half Marathon & 10K in Sausalito, CA
- Happy Easter Half Marathon, 15K, 10K & 5K in Van Nuys, CA
- Hippity Hop Marathon, Half Marathon & 5K in Peoria, AZ
- Hoppin’ Half Marathon, 10K & 5K in Denver, CO
- Just A Short Run Half Marathon, 30K, 5K & 8.1-Mile in Allison Park, PA
- Lantern Run Half Marathon, 10K & 5K – Phoenix in Tempe, AZ
- Laughlin/Runnercard Half Marathon & 5K in Laughlin, NV
- Once in a Double Blue Moon Half Marathon, 10K & 5K in Las Vegas, NV
- Peace-Love-Run San Diego Half Marathon, 10K & 5K in San Diego, CA
- Run the Bluegrass Half Marathon in Lexington, KY
- Spring Run for Fun Marathon, Half Marathon, 10K & 5K in Redmond, WA
- Sunset Half Marathon, 10K & 5K in Atlanta, GA
- T-Town Half Marathon & 5K in Tulsa, OK
- Valencia Trail Race in Valencia, CA
- Yough River Trail Council Half Marathon & 5K in Connellsville, PA
