Boston Marathon logo
BOSTON MARATHON 2023

Allison Mayfield

Bib: 11249•F

LA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 16%
Masters (Masters Women)
#0 / 6539
Top 7%
Division (F40-44)
#0 / 1878
Top 14%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:54
Rank: #8612
Start → 5K
22:54 | 7:22/mi
10K· 6.21 mi
45:13
Rank: #8306 (+306)
5K → 10K
22:19 | 7:11/mi
15K· 9.32 mi
1:07:50
Rank: #8299 (+7)
10K → 15K
22:37 | 7:17/mi
20K· 12.43 mi
1:30:58
Rank: #8396 (-97)
15K → 20K
23:08 | 7:27/mi
Half· 13.11 mi
1:36:02
Rank: #8451 (-55)
20K → Half
5:04 | 7:26/mi
25K· 15.53 mi
1:55:39
Rank: #9177 (-726)
Half → 25K
19:37 | 8:05/mi
30K· 18.64 mi
2:20:27
Rank: #9439 (-262)
25K → 30K
24:48 | 7:59/mi
20M
2:31:19
Rank: #9498 (-59)
30K → 20M
10:52 | 8:00/mi
21M
2:39:52
Rank: #9534 (-36)
20M → 21M
8:33 | 8:33/mi
35K· 21.75 mi
2:45:28
Rank: #9474 (+60)
21M → 35K
5:36 | 7:29/mi
23M
2:55:34
Rank: #9483 (-9)
35K → 23M
10:06 | 8:04/mi
24M
3:03:25
Rank: #9503 (-20)
23M → 24M
7:51 | 7:51/mi
40K· 24.85 mi
3:10:30
Rank: #9543 (-40)
24M → 40K
7:05 | 8:17/mi
25.2M
3:13:27
Rank: #9526 (+17)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:21:11
Rank: #9501 (+25)
25.2M → Finish
7:44 | 7:35/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
Time1:36:02
Pace7:20 /mi
2nd Half
Distance13.11 mi
Time1:45:09
Pace8:01 /mi
📊Positive Split: 9.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:4422:547:2222:54
7:22
-
10K
6.21 mi11:12:0345:137:1722:19
7:11
-0:11
15K
9.32 mi11:34:401:07:507:1722:37
7:17
+0:06
20K
12.43 mi11:57:481:30:587:1923:08
7:27
+0:10
Half
13.11 mi12:02:521:36:027:205:04
7:26
-0:01
25K
15.53 mi12:22:291:55:397:2719:37
8:05
+0:39
30K
18.64 mi12:47:172:20:277:3224:48
7:59
-0:06
20M
20.00 mi12:58:092:31:197:3410:52
8:00
+0:01
21M
21.00 mi13:06:422:39:527:378:33
8:33
+0:33
35K
21.75 mi13:12:182:45:287:375:36
7:29
-1:04
23M
23.00 mi13:22:242:55:347:3810:06
8:04
+0:35
24M
24.00 mi13:30:153:03:257:397:51
7:51
-0:13
40K
24.85 mi13:37:203:10:307:407:05
8:17
+0:26
25.2M
25.20 mi13:40:173:13:277:412:57
8:33
+0:16
Finish
26.22 mi13:48:013:21:117:417:44
7:35
-0:58

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

7:11 /mi

Average Pace

7:41 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:13

58% of race

Time at Steady Pace

1:12:28

36% of race

Time at Slower Pace

11:30

6% of race

Average Pace: 7:40 /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 mi10:49:4422:547:2222:54
7:22
#8612
10K
6.21 mi11:12:0345:137:1722:19
7:11
#8306
15K
9.32 mi11:34:401:07:507:1722:37
7:17
#8299
20K
12.43 mi11:57:481:30:587:1923:08
7:27
#8396
Half
13.11 mi12:02:521:36:027:205:04
7:26
#8451
25K
15.53 mi12:22:291:55:397:2719:37
8:05
#9177
30K
18.64 mi12:47:172:20:277:3224:48
7:59
#9439
20M
20.00 mi12:58:092:31:197:3410:52
8:00
#9498
21M
21.00 mi13:06:422:39:527:378:33
8:33
#9534
35K
21.75 mi13:12:182:45:287:375:36
7:29
#9474
23M
23.00 mi13:22:242:55:347:3810:06
8:04
#9483
24M
24.00 mi13:30:153:03:257:397:51
7:51
#9503
40K
24.85 mi13:37:203:10:307:407:05
8:17
#9543
25.2M
25.20 mi13:40:173:13:277:412:57
8:33
#9526
Finish
26.22 mi13:48:013:21:117:417:44
7:35
#9501
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi8612124212428421(Top 32%)1225(Top 11%)1225(Top 65%)
10K6.21 mi3.10 mi8306+3061148+941148+947992(Top 30%)1051(Top 9%)1051(Top 56%)
15K9.32 mi3.11 mi8299+71147+11147+18421(Top 32%)1225(Top 11%)1225(Top 65%)
20K12.43 mi3.11 mi8396-971196-491196-498890(Top 33%)1445(Top 13%)1445(Top 77%)
Half13.11 mi0.68 mi8451-551223-271223-279678(Top 36%)1749(Top 15%)1749(Top 93%)
25K15.53 mi2.42 mi9177-7261513-2901513-29013441(Top 50%)3880(Top 34%)3880(Top 207%)
30K18.64 mi3.11 mi9439-2621667-1541667-15410754(Top 40%)2515(Top 22%)2515(Top 134%)
20M20.00 mi1.36 mi9498-591705-381705-3810247(Top 38%)2340(Top 20%)2340(Top 125%)
21M21.00 mi1.00 mi9534-361746-411746-4110770(Top 40%)2749(Top 24%)2749(Top 146%)
35K21.75 mi0.75 mi9474+601739+71739+78501(Top 32%)1700(Top 15%)1700(Top 91%)
23M23.00 mi1.25 mi9483-91758-191758-1910243(Top 38%)2614(Top 23%)2614(Top 139%)
24M24.00 mi1.00 mi9503-201796-381796-3810171(Top 38%)2664(Top 23%)2664(Top 142%)
40K24.85 mi0.85 mi9543-401843-471843-4711924(Top 45%)3614(Top 32%)3614(Top 192%)
25.2M25.20 mi0.35 mi9526+171849-61849-69907(Top 37%)2623(Top 23%)2623(Top 140%)
Finish26.22 mi1.02 mi9501+251866-171866-179222(Top 35%)2331(Top 20%)2331(Top 124%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21stories
+97ft-345ft

Overall

8421

Females

1225

F40-44

1225

5K→10K

3.1 - 6.2 mi

Top 30%
×5stories
+79ft-138ft

Overall

7992

Females

1051

F40-44

1051

10K→15K

6.2 - 9.3 mi

Top 32%
×3stories
+67ft-78ft

Overall

8421

Females

1225

F40-44

1225

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

8890

Females

1445

F40-44

1445

20K→Half

12.4 - 13.1 mi

Top 36%
×2stories
+19ft-37ft

Overall

9678

Females

1749

F40-44

1749

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

13441

Females

3880

F40-44

3880

25K→30K

15.5 - 18.6 mi

Top 40%
×9stories
+181ft-148ft

Overall

10754

Females

2515

F40-44

2515

30K→20M

18.6 - 20.0 mi

Top 38%
×5stories
+64ft-50ft

Overall

10247

Females

2340

F40-44

2340

20M→21M

20.0 - 21.0 mi

Top 40%
×8stories
+106ft-24ft

Overall

10770

Females

2749

F40-44

2749

21M→35K

21.0 - 21.8 mi

Top 32%
×7stories
+17ft-86ft

Overall

8501

Females

1700

F40-44

1700

35K→23M

21.8 - 23.0 mi

Top 38%
×5stories
+23ft-63ft

Overall

10243

Females

2614

F40-44

2614

23M→24M

23.0 - 24.0 mi

Top 38%
×6stories
+12ft-82ft

Overall

10171

Females

2664

F40-44

2664

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

11924

Females

3614

F40-44

3614

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

9907

Females

2623

F40-44

2623

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

9222

Females

2331

F40-44

2331

Passing Analysis

Category:
Athletes Passed
1312*
Passed By
2201
Net Change
-889
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8612
5K → 10K423117+306#8612#8306
10K → 15K147140+7#8306#8299
15K → 20K99196-97#8299#8396
20K → Half863-55#8396#8451
Half → 25K10736-726#8451#9177
25K → 30K98360-262#9177#9439
30K → 20M68127-59#9439#9498
20M → 21M65101-36#9498#9534
21M → 35K8222+60#9534#9474
35K → 23M8493-9#9474#9483
23M → 24M6383-20#9483#9503
24M → 40K46*86-40#9503#9543
40K → 25.2M3922+17#9543#9526
25.2M → Finish8055+25#9526#9501
TOTALS1312*2201-889

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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