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    COMBO FILTER

    Best Summer Mostly Flat Marathons for a Boston Qualifier

    18 Boston-qualifying marathons · Summer · Mostly Flat

    These 18 summer mostly flat marathons are certified Boston qualifiers with courses built for fast times. Browse, compare, and plan your BQ attempt.

    Planning context

    How to evaluate summer mostly flat qualifiers

    This collection is useful when the training calendar and terrain are already part of your decision. Summer races give you a defined build window, while a mostly flat course profile shapes the workouts, long runs, and pacing strategy you should rehearse. Compare the race cards for course profile, date, location, and verified historical metrics when available, then open the individual race pages for course notes and official registration details.

    For Boston qualifying, this page should be a short-list tool rather than the final answer. A race with a strong course profile may still be the wrong fit if it falls too soon after your peak training block, requires difficult travel, or uses terrain you have not practiced. A quieter race can be a better choice when the logistics are simple and the course matches your strengths.

    Before you register

    Do not assume every mostly flat course behaves the same. Weather, turns, aid-station spacing, start logistics, and travel recovery can change how realistic your goal pace feels on race day.

    Open each finalist, check the official race link, and compare the target pace against your Boston standard. If the decision is close, use BMQR's comparison tool so course profile, date, location, and verified historical metrics when available are visible in one place.

    Compare finalist racesCheck your qualifying standard

    MISH Waterfront Marathon

    Gladstone, MI
    June 5, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Casper Marathon

    Casper, WY
    June 6, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Maritime Marathon

    Manitowoc, WI
    June 6, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Seaside Marathon

    Ventura, CA
    June 6, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Bound for Boston (Seattle) Marathon

    Olympia, WA
    June 13, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Charlevoix Marathon

    Charlevoix, MI
    June 19, 2027
    Medium (500 - 1,999)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Boise Marathon

    Boise, ID
    June 20, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Missoula Marathon

    Missoula, MT
    June 27, 2027
    Medium (500 - 1,999)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Foot Traffic Flat Marathon

    Portland, OR
    July 4, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Shoreline Marathon

    Ventura, CA
    July 11, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    King Salmon Marathon

    Cordova, AK
    July 17, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Camarillo Marathon

    Camarillo, CA
    August 1, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Bound for Boston (Denver) Marathon

    Denver, CO
    August 1, 2027
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Wausau Marathon

    Wausau, WI
    August 23, 2026
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Santa Rosa Marathon

    Santa Rosa, CA
    August 23, 2026
    Medium (500 - 1,999)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Millennium Meadows Marathon

    Grand Rapids, MI
    August 23, 2026
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Bound for Boston (Milwaukee) Marathon

    Menomonee Falls, WI
    August 23, 2026
    Small (<500)
    Warm to hot (65–80°F), humidity varies
    Mostly Flat

    Appletree Marathon

    Vancouver, WA
    August 30, 2026
    Small (<500)
    Cool (40–60°F), ideal racing conditions
    Mostly Flat

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