Boston Marathon logo
BOSTON MARATHON 2023

Heather Magill

Bib: 3107•F

KY

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 12%
Gender (Female)
#0 / 11423
Top 1%
Masters (Masters Women)
#0 / 6539
Top 0.4%
Division (F40-44)
#0 / 1878
Top 1%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:03
Rank: #4446
Start → 5K
21:03 | 6:47/mi
10K· 6.21 mi
41:39
Rank: #4023 (+423)
5K → 10K
20:36 | 6:38/mi
15K· 9.32 mi
1:02:08
Rank: #3688 (+335)
10K → 15K
20:29 | 6:36/mi
20K· 12.43 mi
1:22:59
Rank: #3674 (+14)
15K → 20K
20:51 | 6:43/mi
Half· 13.11 mi
1:27:29
Rank: #3657 (+17)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:43:53
Rank: #3661 (-4)
Half → 25K
16:24 | 6:46/mi
30K· 18.64 mi
2:05:25
Rank: #3675 (-14)
25K → 30K
21:32 | 6:56/mi
20M
2:14:47
Rank: #3612 (+63)
30K → 20M
9:22 | 6:54/mi
21M
2:22:05
Rank: #3584 (+28)
20M → 21M
7:18 | 7:18/mi
35K· 21.75 mi
2:26:58
Rank: #3519 (+65)
21M → 35K
4:53 | 6:32/mi
23M
2:35:32
Rank: #3439 (+80)
35K → 23M
8:34 | 6:51/mi
24M
2:42:08
Rank: #3372 (+67)
23M → 24M
6:36 | 6:36/mi
40K· 24.85 mi
2:47:53
Rank: #3303 (+69)
24M → 40K
5:45 | 6:44/mi
25.2M
2:50:24
Rank: #3285 (+18)
40K → 25.2M
2:31 | 7:18/mi
Finish· 26.22 mi
2:57:03
Rank: #3206 (+79)
25.2M → Finish
6:39 | 6:32/mi

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
Time1:27:29
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:29:34
Pace6:50 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:3921:036:4721:03
6:47
-
10K
6.21 mi10:43:1541:396:4220:36
6:38
-0:09
15K
9.32 mi11:03:441:02:086:4020:29
6:36
-0:02
20K
12.43 mi11:24:351:22:596:4120:51
6:43
+0:07
Half
13.11 mi11:29:051:27:296:404:30
6:36
-0:07
25K
15.53 mi11:45:291:43:536:4116:24
6:46
+0:10
30K
18.64 mi12:07:012:05:256:4421:32
6:56
+0:10
20M
20.00 mi12:16:232:14:476:449:22
6:54
-0:02
21M
21.00 mi12:23:412:22:056:467:18
7:18
+0:24
35K
21.75 mi12:28:342:26:586:454:53
6:32
-0:46
23M
23.00 mi12:37:082:35:326:468:34
6:51
+0:19
24M
24.00 mi12:43:442:42:086:456:36
6:36
-0:15
40K
24.85 mi12:49:292:47:536:455:45
6:44
+0:08
25.2M
25.20 mi12:52:002:50:246:462:31
7:18
+0:34
Finish
26.22 mi12:58:392:57:036:456:39
6:32
-0:46

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

6:32 /mi

Average Pace

6:45 /mi

Slowest Pace

7:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:14

94% of race

Time at Steady Pace

9:49

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:45 /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 mi10:22:3921:036:4721:03
6:47
#4446
10K
6.21 mi10:43:1541:396:4220:36
6:38
#4023
15K
9.32 mi11:03:441:02:086:4020:29
6:36
#3688
20K
12.43 mi11:24:351:22:596:4120:51
6:43
#3674
Half
13.11 mi11:29:051:27:296:404:30
6:36
#3657
25K
15.53 mi11:45:291:43:536:4116:24
6:46
#3661
30K
18.64 mi12:07:012:05:256:4421:32
6:56
#3675
20M
20.00 mi12:16:232:14:476:449:22
6:54
#3612
21M
21.00 mi12:23:412:22:056:467:18
7:18
#3584
35K
21.75 mi12:28:342:26:586:454:53
6:32
#3519
23M
23.00 mi12:37:082:35:326:468:34
6:51
#3439
24M
24.00 mi12:43:442:42:086:456:36
6:36
#3372
40K
24.85 mi12:49:292:47:536:455:45
6:44
#3303
25.2M
25.20 mi12:52:002:50:246:462:31
7:18
#3285
Finish
26.22 mi12:58:392:57:036:456:39
6:32
#3206
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi44462882883253(Top 12%)160(Top 1%)160(Top 9%)
10K6.21 mi3.10 mi4023+423237+51237+513738(Top 14%)202(Top 2%)202(Top 11%)
15K9.32 mi3.11 mi3688+335202+35202+353253(Top 12%)160(Top 1%)160(Top 9%)
20K12.43 mi3.11 mi3674+14194+8194+83681(Top 14%)197(Top 2%)197(Top 10%)
Half13.11 mi0.68 mi3657+17193+1193+13472(Top 13%)172(Top 2%)172(Top 9%)
25K15.53 mi2.42 mi3661-4196-3196-33869(Top 15%)227(Top 2%)227(Top 12%)
30K18.64 mi3.11 mi3675-14198-2198-23887(Top 15%)243(Top 2%)243(Top 13%)
20M20.00 mi1.36 mi3612+63193+5193+53402(Top 13%)217(Top 2%)217(Top 12%)
21M21.00 mi1.00 mi3584+28190+3190+33637(Top 14%)259(Top 2%)259(Top 14%)
35K21.75 mi0.75 mi3519+65183+7183+72634(Top 10%)151(Top 1%)151(Top 8%)
23M23.00 mi1.25 mi3439+801831832931(Top 11%)192(Top 2%)192(Top 10%)
24M24.00 mi1.00 mi3372+67179+4179+42601(Top 10%)174(Top 2%)174(Top 9%)
40K24.85 mi0.85 mi3303+69176+3176+32505(Top 9%)183(Top 2%)183(Top 10%)
25.2M25.20 mi0.35 mi3285+18175+1175+13018(Top 11%)247(Top 2%)247(Top 13%)
Finish26.22 mi1.02 mi3206+79171+4171+42645(Top 10%)216(Top 2%)216(Top 12%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3253

Females

160

F40-44

160

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3738

Females

202

F40-44

202

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3253

Females

160

F40-44

160

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

3681

Females

197

F40-44

197

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3472

Females

172

F40-44

172

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

3869

Females

227

F40-44

227

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

3887

Females

243

F40-44

243

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3402

Females

217

F40-44

217

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3637

Females

259

F40-44

259

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2634

Females

151

F40-44

151

35K→23M

21.8 - 23.0 mi

Top 11%
×5stories
+23ft-63ft

Overall

2931

Females

192

F40-44

192

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2601

Females

174

F40-44

174

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2505

Females

183

F40-44

183

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

3018

Females

247

F40-44

247

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2stories
+22ft-21ft

Overall

2645

Females

216

F40-44

216

Passing Analysis

Category:
Athletes Passed
1764
Passed By
524
Net Change
+1240
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4446
5K → 10K49673+423#4446#4023
10K → 15K34914+335#4023#3688
15K → 20K10692+14#3688#3674
20K → Half269+17#3674#3657
Half → 25K8690-4#3657#3661
25K → 30K93107-14#3661#3675
30K → 20M8623+63#3675#3612
20M → 21M6436+28#3612#3584
21M → 35K7712+65#3584#3519
35K → 23M10020+80#3519#3439
23M → 24M7811+67#3439#3372
24M → 40K8213+69#3372#3303
40K → 25.2M2810+18#3303#3285
25.2M → Finish9314+79#3285#3206
TOTALS1764524+1240
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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