2027 Glass City Marathon - Apr 25

2027 Glass City Marathon - Apr 25 Countdown

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Race Information

Race2027 Glass City Marathon - Apr 25
CityToledo
Date2027-04-25 at 06:30
Field Size~1,223 runners
Time Limit6 hours 30 min
Cutoff pace9:15/km
Course speed
Typical pace Speed index 1.03 — median of the last 4 winners' times against the global same-year median. Winner times track elite fields and prize money, so this reads the course as a proxy, not a pure measurement.
TimezoneAmerica/New_York
Official SiteToledo Roadrunners

Race Day Weather

Average Temperature11°C / 52°F
Humidity76%
Wind26.6 km/h
Rain Chance44%
Typical ConditionsCool, often-crisp late-April Toledo morning — spring temperatures around 47 degrees F (8 degrees C) at the 6:30 a.m. start, warming through the morning, with a chance of a lakeside breeze off Lake Erie

What to Prepare: A late-April morning in northwest Ohio usually starts cool, around 47 degrees F (8 degrees C), which is close to ideal racing weather for a fast time — but spring near Lake Erie brings a real chance of rain or a gusty wind. Throwaway gloves and a long-sleeve you can shed early are smart, and check the forecast the week before, because the wind off the lake is the main variable on this otherwise honest course.

Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.

Wind Impact on Race Day

Wind at 26.6 km/h can affect your marathon pace by 5-15 seconds per kilometer. Headwinds slow you down exponentially — a 20 km/h wind costs more than twice a 10 km/h wind.

Calculate your wind-adjusted pace →

Race-Week Climate

Based on 20 years of race-week weather (2005-2024), MERRA-2 reanalysis

Cooler Typical Warmer
Temperature 5.2°C 10.6°C 17°C
Dew point -0.3°C 5.8°C 13.4°C
Wet-day chance: 44% Runnability: 70/100

Data: NASA POWER (MERRA-2 reanalysis), NASA Langley Research Center

Course Profile

Course TypeOne-loop city course (stadium finish)
Elevation Gain125m
TerrainRoad (paved city streets and towpath, mostly flat)
ProfileOne of the flattest, fastest big-city qualifiers in the Midwest, which is exactly why Glass City has built a reputation as a Boston-qualifier and PR factory. The single-loop course starts on Bancroft Street near the University of Toledo's North Tower and runs through Toledo's tree-lined neighborhoods, the Old West End historic district and stretches of the Towpath, before a finish that runners remember — a lap inside the Glass Bowl, the university's football stadium, crossing the line on the field. Total elevation gain is only about 412 ft (125 m) spread across gentle rises, so there is no real hill to manage; the course is USATF-certified and Boston-qualifying, and in recent years a fifth to a third of finishers have run a Boston time, among the highest qualifying rates in the country. The trade-off for that speed is exposure: long, straight, open stretches mean wind can be the decisive factor, so it rewards even pacing and a willingness to tuck into a group on a breezy day rather than a cautious one.
Boston QualifierYes — Check your BQ time

Prepare for 2027 Glass City Marathon - Apr 25

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Frequently Asked Questions

When is the 2027 Glass City Marathon and what time does it start?

The Mercy Health Glass City Marathon is on Sunday, April 25, 2027 in Toledo, Ohio, marking the event's 50th anniversary. The full marathon starts at 6:30 a.m. Eastern Time on Bancroft Street, near the University of Toledo's North Tower. Other distances on the weekend include a half marathon, a 5-person relay and a 5K.

Is the Glass City Marathon a good course for a Boston qualifier or PR?

Yes — it is one of the best in the Midwest for both. The course is flat and fast, with only about 412 ft (125 m) of total elevation gain, and it is USATF-certified and Boston-qualifying. In recent years anywhere from a fifth to roughly a third of all finishers have run a Boston-qualifying time — among the highest BQ rates of any U.S. marathon. Check your target on the Boston qualifying calculator and dial in splits with the race time predictor.

Where does the Glass City Marathon course go and where does it finish?

It is a single-loop course starting on Bancroft Street by the University of Toledo and running through Toledo's tree-lined neighborhoods, the Old West End historic district and stretches of paved towpath. The signature feature is the finish: runners enter the Glass Bowl, the university's football stadium, and cross the line on the field. Confirm the latest course map on the official site, as details can shift year to year.

Is the Glass City Marathon course flat, and what about the wind?

The course is mostly flat with no significant hills — about 412 ft (125 m) of gain across gentle rises. The main variable is wind: northwest Ohio sits near Lake Erie, and the long, open straightaways can be exposed on a breezy day. On calm mornings it is a genuine PR setup; when it is windy, even pacing and running in a pack help. Plan your effort with the pace calculator.

What is the time limit for the Glass City Marathon?

The full marathon has a 6.5-hour course time limit from the 6:30 a.m. start. That works out to roughly a 15-minute-per-mile pace (about 9:15 per km) to finish within the cutoff, so it suits qualifying-minded runners and first-time finishers alike.

How do I register for the Glass City Marathon and how big is it?

Registration is handled online through RunSignup via the official Glass City Marathon site; there is no lottery, so entry is first-come, first-served, and the full marathon has sold out in recent years — register early. The standard full-marathon entry has been around $125, with prices rising closer to race day. It is a mid-sized race, with about 1,200 full-marathon finishers in 2026, which keeps the BQ-chasing field competitive without big-city congestion.

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