Boston Marathon logo
BOSTON MARATHON 2023

Kerri Langton

Bib: 12273•F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 16%
Division (F18-39)
#0 / 4884
Top 29%
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
7:33/mi
23:27
↑ 97↓ 3451.5%
10K· 6.21 mi
7:37/mi
47:07
↑ 79↓ 1380.4%
15K· 9.32 mi
7:37/mi
1:10:47
↑ 67↓ 78
20K· 12.43 mi
7:42/mi
1:34:42
↑ 106↓ 860.1%
Half· 13.11 mi
7:34/mi
1:39:52
↑ 19↓ 370.5%
25K· 15.53 mi
7:42/mi
1:58:31
↑ 66↓ 880.2%
30K· 18.64 mi
7:39/mi
2:22:18
↑ 181↓ 1480.2%
20M
7:43/mi
2:32:47
↑ 64↓ 500.2%
21M
8:01/mi
2:40:48
↑ 106↓ 241.6%
35K· 21.75 mi
7:28/mi
2:46:23
↑ 17↓ 861.7%
23M
7:55/mi
2:56:18
↑ 23↓ 630.6%
24M
7:42/mi
3:04:00
↓ 821.3%
40K· 24.85 mi
7:37/mi
3:10:31
↓ 200.3%
25.2M
8:04/mi
3:13:18
↑ 13↓ 160.2%
Finish· 26.22 mi
7:35/mi
3:21:02
↑ 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
Time1:39:52
Pace7:37 /mi
2nd Half
Distance13.11 mi
Time1:41:10
Pace7:43 /mi
📊Positive Split: 1.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:5423:277:3323:27
7:33
-
10K
6.21 mi11:14:3447:077:3523:40
7:37
+0:04
15K
9.32 mi11:38:141:10:477:3623:40
7:37
0:00
20K
12.43 mi12:02:091:34:427:3723:55
7:42
+0:05
Half
13.11 mi12:07:191:39:527:375:10
7:34
-0:08
25K
15.53 mi12:25:581:58:317:3818:39
7:42
+0:08
30K
18.64 mi12:49:452:22:187:3823:47
7:39
-0:03
20M
20.00 mi13:00:142:32:477:3810:29
7:43
+0:04
21M
21.00 mi13:08:152:40:487:398:01
8:01
+0:18
35K
21.75 mi13:13:502:46:237:395:35
7:28
-0:33
23M
23.00 mi13:23:452:56:187:409:55
7:55
+0:27
24M
24.00 mi13:31:273:04:007:407:42
7:42
-0:13
40K
24.85 mi13:37:583:10:317:406:31
7:37
-0:05
25.2M
25.20 mi13:40:453:13:187:402:47
8:04
+0:27
Finish
26.22 mi13:48:293:21:027:407:44
7:35
-0:29

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

7:28 /mi

Average Pace

7:40 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:00:19

90% of race

Time at Steady Pace

20:43

10% of race

Time at Slower Pace

0:00

0% 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 mi10:50:5423:277:3323:27
7:33
#10070
10K
6.21 mi11:14:3447:077:3523:40
7:37
#10771
15K
9.32 mi11:38:141:10:477:3623:40
7:37
#10889
20K
12.43 mi12:02:091:34:427:3723:55
7:42
#10877
Half
13.11 mi12:07:191:39:527:375:10
7:34
#10877
25K
15.53 mi12:25:581:58:317:3818:39
7:42
#10728
30K
18.64 mi12:49:452:22:187:3823:47
7:39
#10236
20M
20.00 mi13:00:142:32:477:3810:29
7:43
#10070
21M
21.00 mi13:08:152:40:487:398:01
8:01
#9871
35K
21.75 mi13:13:502:46:237:395:35
7:28
#9802
23M
23.00 mi13:23:452:56:187:409:55
7:55
#9730
24M
24.00 mi13:31:273:04:007:407:42
7:42
#9666
40K
24.85 mi13:37:583:10:317:406:31
7:37
#9545
25.2M
25.20 mi13:40:453:13:187:402:47
8:04
#9487
Finish
26.22 mi13:48:293:21:027:407:44
7:35
#9462
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi100701895189511169(Top 42%)2437(Top 21%)2437(Top 50%)
10K6.21 mi3.10 mi10771-7012213-3182213-31811489(Top 43%)2591(Top 23%)2591(Top 53%)
15K9.32 mi3.11 mi10889-1182273-602273-6011169(Top 42%)2437(Top 21%)2437(Top 50%)
20K12.43 mi3.11 mi10877+122280-72280-710911(Top 41%)2360(Top 21%)2360(Top 48%)
Half13.11 mi0.68 mi108772272+82272+810841(Top 41%)2270(Top 20%)2270(Top 46%)
25K15.53 mi2.42 mi10728+1492213+592213+5910240(Top 38%)2103(Top 18%)2103(Top 43%)
30K18.64 mi3.11 mi10236+4922013+2002013+2008343(Top 31%)1446(Top 13%)1446(Top 30%)
20M20.00 mi1.36 mi10070+1661956+571956+578324(Top 31%)1528(Top 13%)1528(Top 31%)
21M21.00 mi1.00 mi9871+1991886+701886+707485(Top 28%)1316(Top 12%)1316(Top 27%)
35K21.75 mi0.75 mi9802+691872+141872+148328(Top 31%)1630(Top 14%)1630(Top 33%)
23M23.00 mi1.25 mi9730+721878-61878-69228(Top 35%)2131(Top 19%)2131(Top 44%)
24M24.00 mi1.00 mi9666+641871+71871+79108(Top 34%)2152(Top 19%)2152(Top 44%)
40K24.85 mi0.85 mi9545+1211844+271844+277484(Top 28%)1557(Top 14%)1557(Top 32%)
25.2M25.20 mi0.35 mi9487+581833+111833+117003(Top 26%)1426(Top 12%)1426(Top 29%)
Finish26.22 mi1.02 mi9462+251847-141847-149221(Top 35%)2330(Top 20%)2330(Top 48%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

11169

Females

2437

F18-39

2437

5K→10K

3.1 - 6.2 mi

Top 43%
×5story building
+79ft-138ft

Overall

11489

Females

2591

F18-39

2591

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

11169

Females

2437

F18-39

2437

15K→20K

9.3 - 12.4 mi

Top 41%
×5story building
+106ft-86ft

Overall

10911

Females

2360

F18-39

2360

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

10841

Females

2270

F18-39

2270

Half→25K

13.1 - 15.5 mi

Top 38%
×4story building
+66ft-88ft

Overall

10240

Females

2103

F18-39

2103

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8343

Females

1446

F18-39

1446

30K→20M

18.6 - 20.0 mi

Top 31%
×5story building
+64ft-50ft

Overall

8324

Females

1528

F18-39

1528

20M→21M

20.0 - 21.0 mi

Top 28%
×8story building
+106ft-24ft

Overall

7485

Females

1316

F18-39

1316

21M→35K

21.0 - 21.8 mi

Top 31%
×7story building
+17ft-86ft

Overall

8328

Females

1630

F18-39

1630

35K→23M

21.8 - 23.0 mi

Top 35%
×5story building
+23ft-63ft

Overall

9228

Females

2131

F18-39

2131

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9108

Females

2152

F18-39

2152

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

7484

Females

1557

F18-39

1557

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7003

Females

1426

F18-39

1426

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2story building
+22ft-21ft

Overall

9221

Females

2330

F18-39

2330

Passing Analysis

Category:
Athletes Passed
2077*
Passed By
1469
Net Change
+608
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10070
5K → 10K84785-701#10070#10771
10K → 15K138256-118#10771#10889
15K → 20K168156+12#10889#10877
20K → Half33330#10877#10877
Half → 25K19950+149#10877#10728
25K → 30K498*6+492#10728#10236
30K → 20M184*18+166#10236#10070
20M → 21M211*12+199#10070#9871
21M → 35K789+69#9871#9802
35K → 23M12048+72#9802#9730
23M → 24M9531+64#9730#9666
24M → 40K128*7+121#9666#9545
40K → 25.2M624+58#9545#9487
25.2M → Finish7954+25#9487#9462
TOTALS2077*1469+608

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

📊

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