Boston Marathon logo
BOSTON MARATHON 2023

Mairead Hadley

Bib: 27851•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
10:20/mi
32:06
↑ 97↓ 3451.5%
10K· 6.21 mi
10:00/mi
1:03:11
↑ 79↓ 1380.4%
15K· 9.32 mi
10:13/mi
1:34:54
↑ 67↓ 78
20K· 12.43 mi
10:20/mi
2:07:00
↑ 106↓ 860.1%
Half· 13.11 mi
10:08/mi
2:13:55
↑ 19↓ 370.5%
25K· 15.53 mi
10:32/mi
2:39:27
↑ 66↓ 880.2%
30K· 18.64 mi
12:13/mi
3:17:24
↑ 181↓ 1480.2%
20M
11:10/mi
3:32:35
↑ 64↓ 500.2%
21M
11:18/mi
3:43:53
↑ 106↓ 241.6%
35K· 21.75 mi
10:40/mi
3:51:52
↑ 17↓ 861.7%
23M
11:01/mi
4:05:40
↑ 23↓ 630.6%
24M
12:03/mi
4:17:43
↓ 821.3%
40K· 24.85 mi
10:42/mi
4:26:52
↓ 200.3%
25.2M
11:07/mi
4:30:42
↑ 13↓ 160.2%
Finish· 26.22 mi
10:07/mi
4:41:01
↑ 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
Time2:13:55
Pace10:13 /mi
2nd Half
Distance13.11 mi
Time2:27:06
Pace11:13 /mi
📊Positive Split: 9.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:1332:0610:2032:06
10:20
-
10K
6.21 mi12:20:181:03:1110:1031:05
10:00
-0:20
15K
9.32 mi12:52:011:34:5410:1131:43
10:13
+0:13
20K
12.43 mi13:24:072:07:0010:1332:06
10:20
+0:07
Half
13.11 mi13:31:022:13:5510:136:55
10:08
-0:12
25K
15.53 mi13:56:342:39:2710:1625:32
10:32
+0:24
30K
18.64 mi14:34:313:17:2410:3537:57
12:13
+1:41
20M
20.00 mi14:49:423:32:3510:3815:11
11:10
-1:03
21M
21.00 mi15:01:003:43:5310:4011:18
11:18
+0:08
35K
21.75 mi15:08:593:51:5210:407:59
10:40
-0:38
23M
23.00 mi15:22:474:05:4010:4113:48
11:01
+0:21
24M
24.00 mi15:34:504:17:4310:4412:03
12:03
+1:02
40K
24.85 mi15:43:594:26:5210:449:09
10:42
-1:21
25.2M
25.20 mi15:47:494:30:4210:453:50
11:07
+0:25
Finish
26.22 mi15:58:084:41:0110:4410:19
10:07
-1:00

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

10:00 /mi

Average Pace

10:44 /mi

Slowest Pace

12:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:24:14

51% of race

Time at Steady Pace

42:40

15% of race

Time at Slower Pace

1:34:07

33% of race

Average Pace: 10:43 /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 mi11:49:1332:0610:2032:06
10:20
#24302
10K
6.21 mi12:20:181:03:1110:1031:05
10:00
#23995
15K
9.32 mi12:52:011:34:5410:1131:43
10:13
#23961
20K
12.43 mi13:24:072:07:0010:1332:06
10:20
#23851
Half
13.11 mi13:31:022:13:5510:136:55
10:08
#23829
25K
15.53 mi13:56:342:39:2710:1625:32
10:32
#23710
30K
18.64 mi14:34:313:17:2410:3537:57
12:13
#23981
20M
20.00 mi14:49:423:32:3510:3815:11
11:10
#23909
21M
21.00 mi15:01:003:43:5310:4011:18
11:18
#23781
35K
21.75 mi15:08:593:51:5210:407:59
10:40
#23758
23M
23.00 mi15:22:474:05:4010:4113:48
11:01
#23694
24M
24.00 mi15:34:504:17:4310:4412:03
12:03
#23759
40K
24.85 mi15:43:594:26:5210:449:09
10:42
#23688
25.2M
25.20 mi15:47:494:30:4210:453:50
11:07
#23652
Finish
26.22 mi15:58:084:41:0110:4410:19
10:07
#23622
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24302100421004223903(Top 90%)9843(Top 86%)9843(Top 202%)
10K6.21 mi3.10 mi23995+3079890+1529890+15223695(Top 89%)9727(Top 85%)9727(Top 199%)
15K9.32 mi3.11 mi23961+349871+199871+1923903(Top 90%)9843(Top 86%)9843(Top 202%)
20K12.43 mi3.11 mi23851+1109812+599812+5923535(Top 88%)9652(Top 84%)9652(Top 198%)
Half13.11 mi0.68 mi23829+229796+169796+1623569(Top 89%)9665(Top 85%)9665(Top 198%)
25K15.53 mi2.42 mi23710+1199744+529744+5223251(Top 87%)9524(Top 83%)9524(Top 195%)
30K18.64 mi3.11 mi23981-2719906-1629906-16224724(Top 93%)10411(Top 91%)10411(Top 213%)
20M20.00 mi1.36 mi23909+729870+369870+3622985(Top 86%)9505(Top 83%)9505(Top 195%)
21M21.00 mi1.00 mi23781+1289818+529818+5221496(Top 81%)8740(Top 77%)8740(Top 179%)
35K21.75 mi0.75 mi23758+239808+109808+1022718(Top 85%)9436(Top 83%)9436(Top 193%)
23M23.00 mi1.25 mi23694+649781+279781+2722402(Top 84%)9269(Top 81%)9269(Top 190%)
24M24.00 mi1.00 mi23759-659826-459826-4524599(Top 92%)10484(Top 92%)10484(Top 215%)
40K24.85 mi0.85 mi23688+719798+289798+2821729(Top 82%)9009(Top 79%)9009(Top 184%)
25.2M25.20 mi0.35 mi23652+369779+199779+1920767(Top 78%)8473(Top 74%)8473(Top 173%)
Finish26.22 mi1.02 mi23622+309772+79772+722109(Top 83%)9175(Top 80%)9175(Top 188%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 90%
×21story building
+97ft-345ft

Overall

23903

Females

9843

F18-39

9843

5K→10K

3.1 - 6.2 mi

Top 89%
×5story building
+79ft-138ft

Overall

23695

Females

9727

F18-39

9727

10K→15K

6.2 - 9.3 mi

Top 90%
×3story building
+67ft-78ft

Overall

23903

Females

9843

F18-39

9843

15K→20K

9.3 - 12.4 mi

Top 88%
×5story building
+106ft-86ft

Overall

23535

Females

9652

F18-39

9652

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

23569

Females

9665

F18-39

9665

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

23251

Females

9524

F18-39

9524

25K→30K

15.5 - 18.6 mi

Top 93%
×9story building
+181ft-148ft

Overall

24724

Females

10411

F18-39

10411

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

22985

Females

9505

F18-39

9505

20M→21M

20.0 - 21.0 mi

Top 81%
×8story building
+106ft-24ft

Overall

21496

Females

8740

F18-39

8740

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

22718

Females

9436

F18-39

9436

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

22402

Females

9269

F18-39

9269

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

24599

Females

10484

F18-39

10484

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

21729

Females

9009

F18-39

9009

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

20767

Females

8473

F18-39

8473

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

22109

Females

9175

F18-39

9175

Passing Analysis

Category:
Athletes Passed
1428
Passed By
748
Net Change
+680
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24302
5K → 10K39689+307#24302#23995
10K → 15K137103+34#23995#23961
15K → 20K17262+110#23961#23851
20K → Half297+22#23851#23829
Half → 25K15334+119#23829#23710
25K → 30K36307-271#23710#23981
30K → 20M8412+72#23981#23909
20M → 21M1379+128#23909#23781
21M → 35K3815+23#23781#23758
35K → 23M8016+64#23758#23694
23M → 24M1176-65#23694#23759
24M → 40K765+71#23759#23688
40K → 25.2M360+36#23688#23652
25.2M → Finish4313+30#23652#23622
TOTALS1428748+680
📊

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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing