Boston Marathon logo
BOSTON MARATHON 2023

Mary Beth Burwood

Bib: 31451•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

Start
0:00:00
Race begins
5K· 3.11 mi
33:05
Rank: #25079
Start → 5K
10:39/mi
33:05 split
10K· 6.21 mi
1:06:36
Rank: #25124 (-45)
5K → 10K
10:47/mi
33:31 split
15K· 9.32 mi
1:41:43
Rank: #25324 (-200)
10K → 15K
11:18/mi
35:07 split
20K· 12.43 mi
2:15:15
Rank: #25050 (+274)
15K → 20K
10:48/mi
33:32 split
Half· 13.11 mi
2:22:41
Rank: #25032 (+18)
20K → Half
10:54/mi
7:26 split
25K· 15.53 mi
2:50:40
Rank: #24998 (+34)
Half → 25K
11:32/mi
27:59 split
30K· 18.64 mi
3:27:29
Rank: #24879 (+119)
25K → 30K
11:51/mi
36:49 split
20M
3:48:10
Rank: #25121 (-242)
30K → 20M
15:13/mi
20:41 split
21M
4:04:49
Rank: #25273 (-152)
20M → 21M
16:39/mi
16:39 split
35K· 21.75 mi
4:15:35
Rank: #25335 (-62)
21M → 35K
14:23/mi
10:46 split
23M
4:34:39
Rank: #25460 (-125)
35K → 23M
15:14/mi
19:04 split
24M
4:48:32
Rank: #25501 (-41)
23M → 24M
13:53/mi
13:53 split
40K· 24.85 mi
5:00:17
Rank: #25511 (-10)
24M → 40K
13:45/mi
11:45 split
25.2M
5:04:29
Rank: #25487 (+24)
40K → 25.2M
12:11/mi
4:12 split
Finish· 26.22 mi
5:15:26
Rank: #25438 (+49)
25.2M → Finish
10:45/mi
10:57 split

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
Time2:22:41
Pace10:53 /mi
2nd Half
Distance13.11 mi
Time2:52:45
Pace13:11 /mi
📊Positive Split: 21.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:2133:0510:3933:05
10:39
-
10K
6.21 mi12:22:521:06:3610:4333:31
10:47
+0:08
15K
9.32 mi12:57:591:41:4310:5535:07
11:18
+0:31
20K
12.43 mi13:31:312:15:1510:5333:32
10:48
-0:30
Half
13.11 mi13:38:572:22:4110:537:26
10:54
+0:06
25K
15.53 mi14:06:562:50:4010:5927:59
11:32
+0:38
30K
18.64 mi14:43:453:27:2911:0836:49
11:51
+0:19
20M
20.00 mi15:04:263:48:1011:2420:41
15:13
+3:22
21M
21.00 mi15:21:054:04:4911:3916:39
16:39
+1:26
35K
21.75 mi15:31:514:15:3511:4510:46
14:23
-2:16
23M
23.00 mi15:50:554:34:3911:5619:04
15:14
+0:51
24M
24.00 mi16:04:484:48:3212:0113:53
13:53
-1:21
40K
24.85 mi16:16:335:00:1712:0511:45
13:45
-0:08
25.2M
25.20 mi16:20:455:04:2912:054:12
12:11
-1:34
Finish
26.22 mi16:31:425:15:2612:0210:57
10:45
-1:26

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

10:39 /mi

Average Pace

12:02 /mi

Slowest Pace

16:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:05

35% of race

Time at Steady Pace

1:51:33

35% of race

Time at Slower Pace

1:32:48

29% of race

Average Pace: 12:02 /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 mi11:49:2133:0510:3933:05
10:39
#25079
10K
6.21 mi12:22:521:06:3610:4333:31
10:47
#25124
15K
9.32 mi12:57:591:41:4310:5535:07
11:18
#25324
20K
12.43 mi13:31:312:15:1510:5333:32
10:48
#25050
Half
13.11 mi13:38:572:22:4110:537:26
10:54
#25032
25K
15.53 mi14:06:562:50:4010:5927:59
11:32
#24998
30K
18.64 mi14:43:453:27:2911:0836:49
11:51
#24879
20M
20.00 mi15:04:263:48:1011:2420:41
15:13
#25121
21M
21.00 mi15:21:054:04:4911:3916:39
16:39
#25273
35K
21.75 mi15:31:514:15:3511:4510:46
14:23
#25335
23M
23.00 mi15:50:554:34:3911:5619:04
15:14
#25460
24M
24.00 mi16:04:484:48:3212:0113:53
13:53
#25501
40K
24.85 mi16:16:335:00:1712:0511:45
13:45
#25511
25.2M
25.20 mi16:20:455:04:2912:054:12
12:11
#25487
Finish
26.22 mi16:31:425:15:2612:0210:57
10:45
#25438
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25079104791047925520(Top 96%)10763(Top 94%)10763(Top 220%)
10K6.21 mi3.10 mi25124-4510505-2610505-2625157(Top 94%)10528(Top 92%)10528(Top 216%)
15K9.32 mi3.11 mi25324-20010628-12310628-12325520(Top 96%)10763(Top 94%)10763(Top 220%)
20K12.43 mi3.11 mi25050+27410486+14210486+14224313(Top 91%)10096(Top 88%)10096(Top 207%)
Half13.11 mi0.68 mi25032+1810473+1310473+1324815(Top 93%)10390(Top 91%)10390(Top 213%)
25K15.53 mi2.42 mi24998+3410464+910464+924728(Top 93%)10359(Top 91%)10359(Top 212%)
30K18.64 mi3.11 mi24879+11910421+4310421+4324327(Top 91%)10182(Top 89%)10182(Top 208%)
20M20.00 mi1.36 mi25121-24210567-14610567-14626364(Top 99%)11310(Top 99%)11310(Top 232%)
21M21.00 mi1.00 mi25273-15210655-8810655-8826379(Top 99%)11309(Top 99%)11309(Top 232%)
35K21.75 mi0.75 mi25335-6210701-4610701-4626269(Top 99%)11260(Top 99%)11260(Top 231%)
23M23.00 mi1.25 mi25460-12510771-7010771-7026351(Top 99%)11307(Top 99%)11307(Top 232%)
24M24.00 mi1.00 mi25501-4110797-2610797-2626019(Top 98%)11167(Top 98%)11167(Top 229%)
40K24.85 mi0.85 mi25511-1010808-1110808-1125528(Top 96%)10940(Top 96%)10940(Top 224%)
25.2M25.20 mi0.35 mi25487+2410795+1310795+1322842(Top 86%)9580(Top 84%)9580(Top 196%)
Finish26.22 mi1.02 mi25438+4910773+2210773+2223515(Top 88%)9919(Top 87%)9919(Top 203%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 96%
×21stories
+97ft-345ft

Overall

25520

Females

10763

F18-39

10763

5K→10K

3.1 - 6.2 mi

Top 94%
×5stories
+79ft-138ft

Overall

25157

Females

10528

F18-39

10528

10K→15K

6.2 - 9.3 mi

Top 96%
×3stories
+67ft-78ft

Overall

25520

Females

10763

F18-39

10763

15K→20K

9.3 - 12.4 mi

Top 91%
×5stories
+106ft-86ft

Overall

24313

Females

10096

F18-39

10096

20K→Half

12.4 - 13.1 mi

Top 93%
×2stories
+19ft-37ft

Overall

24815

Females

10390

F18-39

10390

Half→25K

13.1 - 15.5 mi

Top 93%
×4stories
+66ft-88ft

Overall

24728

Females

10359

F18-39

10359

25K→30K

15.5 - 18.6 mi

Top 91%
×9stories
+181ft-148ft

Overall

24327

Females

10182

F18-39

10182

30K→20M

18.6 - 20.0 mi

Top 99%
×5stories
+64ft-50ft

Overall

26364

Females

11310

F18-39

11310

20M→21M

20.0 - 21.0 mi

Top 99%
×8stories
+106ft-24ft

Overall

26379

Females

11309

F18-39

11309

21M→35K

21.0 - 21.8 mi

Top 99%
×7stories
+17ft-86ft

Overall

26269

Females

11260

F18-39

11260

35K→23M

21.8 - 23.0 mi

Top 99%
×5stories
+23ft-63ft

Overall

26351

Females

11307

F18-39

11307

23M→24M

23.0 - 24.0 mi

Top 98%
×6stories
+12ft-82ft

Overall

26019

Females

11167

F18-39

11167

24M→40K

24.0 - 24.9 mi

Top 96%
×1story
+6ft-20ft

Overall

25528

Females

10940

F18-39

10940

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

22842

Females

9580

F18-39

9580

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2stories
+22ft-21ft

Overall

23515

Females

9919

F18-39

9919

Passing Analysis

Category:
Athletes Passed
864
Passed By
1223
Net Change
-359
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25079
5K → 10K151196-45#25079#25124
10K → 15K45245-200#25124#25324
15K → 20K2806+274#25324#25050
20K → Half2810+18#25050#25032
Half → 25K8450+34#25032#24998
25K → 30K15738+119#24998#24879
30K → 20M3245-242#24879#25121
20M → 21M4156-152#25121#25273
21M → 35K870-62#25273#25335
35K → 23M3128-125#25335#25460
23M → 24M950-41#25460#25501
24M → 40K1929-10#25501#25511
40K → 25.2M240+24#25511#25487
25.2M → Finish490+49#25487#25438
TOTALS8641223-359
📊

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