Boston Marathon logo
BOSTON MARATHON 2025

Cornelia Williams

Bib: 24255•F

NY

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F55-59)
#0 / 994
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:29/mi
29:29
↑ 97↓ 3451.5%
10K· 6.21 mi
9:13/mi
58:08
↑ 79↓ 1380.4%
15K· 9.32 mi
9:15/mi
1:26:53
↑ 67↓ 78
20K· 12.43 mi
9:15/mi
1:55:38
↑ 106↓ 860.1%
Half· 13.11 mi
9:05/mi
2:01:50
↑ 19↓ 370.5%
25K· 15.53 mi
9:20/mi
2:24:28
↑ 66↓ 880.2%
30K· 18.64 mi
9:42/mi
2:54:35
↑ 181↓ 1480.2%
20M
9:33/mi
3:07:33
↑ 64↓ 500.2%
21M
10:24/mi
3:17:57
↑ 106↓ 241.6%
35K· 21.75 mi
9:40/mi
3:25:11
↑ 17↓ 861.7%
23M
9:21/mi
3:36:53
↑ 23↓ 630.6%
24M
9:18/mi
3:46:11
↓ 821.3%
40K· 24.85 mi
9:38/mi
3:54:25
↓ 200.3%
25.2M
10:26/mi
3:58:01
↑ 13↓ 160.2%
Finish· 26.22 mi
8:50/mi
4:07:01
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:50
Pace9:18 /mi
2nd Half
Distance13.11 mi
Time2:05:11
Pace9:33 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:0929:299:2929:29
9:29
-
10K
6.21 mi11:56:4858:089:2128:39
9:13
-0:16
15K
9.32 mi12:25:331:26:539:1928:45
9:15
+0:02
20K
12.43 mi12:54:181:55:389:1828:45
9:15
0:00
Half
13.11 mi13:00:302:01:509:186:12
9:05
-0:10
25K
15.53 mi13:23:082:24:289:1822:38
9:20
+0:15
30K
18.64 mi13:53:152:54:359:2230:07
9:42
+0:22
20M
20.00 mi14:06:133:07:339:2312:58
9:33
-0:09
21M
21.00 mi14:16:373:17:579:2610:24
10:24
+0:51
35K
21.75 mi14:23:513:25:119:267:14
9:40
-0:44
23M
23.00 mi14:35:333:36:539:2611:42
9:21
-0:19
24M
24.00 mi14:44:513:46:119:259:18
9:18
-0:03
40K
24.85 mi14:53:053:54:259:268:14
9:38
+0:20
25.2M
25.20 mi14:56:413:58:019:273:36
10:26
+0:48
Finish
26.22 mi15:05:414:07:019:269:00
8:50
-1:36

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

8:50 /mi

Average Pace

9:26 /mi

Slowest Pace

10:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:53:01

94% of race

Time at Steady Pace

10:24

4% of race

Time at Slower Pace

3:36

1% of race

Average Pace: 9:25 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:28:0929:299:2929:29
9:29
#24215
10K
6.21 mi11:56:4858:089:2128:39
9:13
#23750
15K
9.32 mi12:25:331:26:539:1928:45
9:15
#23519
20K
12.43 mi12:54:181:55:389:1828:45
9:15
#23153
Half
13.11 mi13:00:302:01:509:186:12
9:05
#23101
25K
15.53 mi13:23:082:24:289:1822:38
9:20
#22787
30K
18.64 mi13:53:152:54:359:2230:07
9:42
#22380
20M
20.00 mi14:06:133:07:339:2312:58
9:33
#22175
21M
21.00 mi14:16:373:17:579:2610:24
10:24
#22006
35K
21.75 mi14:23:513:25:119:267:14
9:40
#21948
23M
23.00 mi14:35:333:36:539:2611:42
9:21
#21723
24M
24.00 mi14:44:513:46:119:259:18
9:18
#21600
40K
24.85 mi14:53:053:54:259:268:14
9:38
#21498
25.2M
25.20 mi14:56:413:58:019:273:36
10:26
#21443
Finish
26.22 mi15:05:414:07:019:269:00
8:50
#21347
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi242159807980723057(Top 81%)9124(Top 75%)9124(Top 918%)
10K6.21 mi3.10 mi23750+4659551+2569551+25623280(Top 82%)9284(Top 76%)9284(Top 934%)
15K9.32 mi3.11 mi23519+2319423+1289423+12823057(Top 81%)9124(Top 75%)9124(Top 918%)
20K12.43 mi3.11 mi23153+3669212+2119212+21122100(Top 78%)8641(Top 71%)8641(Top 869%)
Half13.11 mi0.68 mi23101+529181+319181+3122197(Top 78%)8714(Top 71%)8714(Top 877%)
25K15.53 mi2.42 mi22787+3149027+1549027+15421320(Top 75%)8268(Top 68%)8268(Top 832%)
30K18.64 mi3.11 mi22380+4078839+1888839+18820682(Top 73%)8038(Top 66%)8038(Top 809%)
20M20.00 mi1.36 mi22175+2058737+1028737+10219381(Top 68%)7471(Top 61%)7471(Top 752%)
21M21.00 mi1.00 mi22006+1698668+698668+6919721(Top 69%)7755(Top 63%)7755(Top 780%)
35K21.75 mi0.75 mi21948+588652+168652+1620924(Top 74%)8467(Top 69%)8467(Top 852%)
23M23.00 mi1.25 mi21723+2258562+908562+9018016(Top 63%)6996(Top 57%)6996(Top 704%)
24M24.00 mi1.00 mi21600+1238508+548508+5418850(Top 66%)7475(Top 61%)7475(Top 752%)
40K24.85 mi0.85 mi21498+1028473+358473+3519232(Top 68%)7752(Top 63%)7752(Top 780%)
25.2M25.20 mi0.35 mi21443+558450+238450+2318866(Top 66%)7577(Top 62%)7577(Top 762%)
Finish26.22 mi1.02 mi21347+968415+358415+3518244(Top 64%)7218(Top 59%)7218(Top 726%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

23057

Females

9124

F55-59

9124

5K→10K

3.1 - 6.2 mi

Top 82%
×5story building
+79ft-138ft

Overall

23280

Females

9284

F55-59

9284

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

23057

Females

9124

F55-59

9124

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

22100

Females

8641

F55-59

8641

20K→Half

12.4 - 13.1 mi

Top 78%
×2story building
+19ft-37ft

Overall

22197

Females

8714

F55-59

8714

Half→25K

13.1 - 15.5 mi

Top 75%
×4story building
+66ft-88ft

Overall

21320

Females

8268

F55-59

8268

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

20682

Females

8038

F55-59

8038

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

19381

Females

7471

F55-59

7471

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

19721

Females

7755

F55-59

7755

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

20924

Females

8467

F55-59

8467

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

18016

Females

6996

F55-59

6996

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

18850

Females

7475

F55-59

7475

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19232

Females

7752

F55-59

7752

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

18866

Females

7577

F55-59

7577

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2story building
+22ft-21ft

Overall

18244

Females

7218

F55-59

7218

Passing Analysis

Category:
Athletes Passed
3142
Passed By
274
Net Change
+2868
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24215
5K → 10K54782+465#24215#23750
10K → 15K29059+231#23750#23519
15K → 20K38519+366#23519#23153
20K → Half597+52#23153#23101
Half → 25K32713+314#23101#22787
25K → 30K43124+407#22787#22380
30K → 20M2094+205#22380#22175
20M → 21M18112+169#22175#22006
21M → 35K7416+58#22006#21948
35K → 23M2316+225#21948#21723
23M → 24M1318+123#21723#21600
24M → 40K1108+102#21600#21498
40K → 25.2M583+55#21498#21443
25.2M → Finish10913+96#21443#21347
TOTALS3142274+2868
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing