Boston Marathon logo
BOSTON MARATHON 2023

Lauren Kaminski

Bib: 25420•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
11:43/mi
36:24
↑ 97↓ 3451.5%
10K· 6.21 mi
11:17/mi
1:11:28
↑ 79↓ 1380.4%
15K· 9.32 mi
12:47/mi
1:51:11
↑ 67↓ 78
20K· 12.43 mi
12:43/mi
2:30:43
↑ 106↓ 860.1%
Half· 13.11 mi
11:26/mi
2:38:31
↑ 19↓ 370.5%
25K· 15.53 mi
14:06/mi
3:12:42
↑ 66↓ 880.2%
30K· 18.64 mi
13:55/mi
3:55:56
↑ 181↓ 1480.2%
20M
14:14/mi
4:15:17
↑ 64↓ 500.2%
21M
15:23/mi
4:30:40
↑ 106↓ 241.6%
35K· 21.75 mi
13:46/mi
4:40:58
↑ 17↓ 861.7%
23M
13:51/mi
4:58:18
↑ 23↓ 630.6%
24M
12:26/mi
5:10:44
↓ 821.3%
40K· 24.85 mi
13:59/mi
5:22:41
↓ 200.3%
25.2M
14:24/mi
5:27:39
↑ 13↓ 160.2%
Finish· 26.22 mi
12:19/mi
5:40:12
↑ 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
Time2:38:31
Pace12:05 /mi
2nd Half
Distance13.11 mi
Time3:01:41
Pace13:52 /mi
📊Positive Split: 14.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:56:1936:2411:4336:24
11:43
-
10K
6.21 mi12:31:231:11:2811:3035:04
11:17
-0:26
15K
9.32 mi13:11:061:51:1111:5639:43
12:47
+1:30
20K
12.43 mi13:50:382:30:4312:0839:32
12:43
-0:04
Half
13.11 mi13:58:262:38:3112:057:48
11:26
-1:17
25K
15.53 mi14:32:373:12:4212:2434:11
14:06
+2:40
30K
18.64 mi15:15:513:55:5612:3943:14
13:55
-0:11
20M
20.00 mi15:35:124:15:1712:4619:21
14:14
+0:19
21M
21.00 mi15:50:354:30:4012:5315:23
15:23
+1:09
35K
21.75 mi16:00:534:40:5812:5510:18
13:46
-1:37
23M
23.00 mi16:18:134:58:1812:5817:20
13:51
+0:05
24M
24.00 mi16:30:395:10:4412:5712:26
12:26
-1:25
40K
24.85 mi16:42:365:22:4112:5911:57
13:59
+1:33
25.2M
25.20 mi16:47:345:27:3913:004:58
14:24
+0:25
Finish
26.22 mi17:00:075:40:1212:5912:33
12:19
-2:05

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

11:17 /mi

Average Pace

12:59 /mi

Slowest Pace

15:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:03:30

54% of race

Time at Steady Pace

2:16:21

40% of race

Time at Slower Pace

20:21

6% of race

Average Pace: 12:58 /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 mi11:56:1936:2411:4336:24
11:43
#26334
10K
6.21 mi12:31:231:11:2811:3035:04
11:17
#26096
15K
9.32 mi13:11:061:51:1111:5639:43
12:47
#26253
20K
12.43 mi13:50:382:30:4312:0839:32
12:43
#26220
Half
13.11 mi13:58:262:38:3112:057:48
11:26
#26199
25K
15.53 mi14:32:373:12:4212:2434:11
14:06
#26254
30K
18.64 mi15:15:513:55:5612:3943:14
13:55
#26218
20M
20.00 mi15:35:124:15:1712:4619:21
14:14
#26202
21M
21.00 mi15:50:354:30:4012:5315:23
15:23
#26199
35K
21.75 mi16:00:534:40:5812:5510:18
13:46
#26203
23M
23.00 mi16:18:134:58:1812:5817:20
13:51
#26193
24M
24.00 mi16:30:395:10:4412:5712:26
12:26
#26167
40K
24.85 mi16:42:365:22:4112:5911:57
13:59
#26154
25.2M
25.20 mi16:47:345:27:3913:004:58
14:24
#26151
Finish
26.22 mi17:00:075:40:1212:5912:33
12:19
#26135
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi26334112511125126428(Top 99%)11316(Top 99%)11316(Top 232%)
10K6.21 mi3.10 mi26096+23811102+14911102+14925776(Top 97%)10898(Top 95%)10898(Top 223%)
15K9.32 mi3.11 mi26253-15711201-9911201-9926428(Top 99%)11316(Top 99%)11316(Top 232%)
20K12.43 mi3.11 mi26220+3311180+2111180+2126099(Top 98%)11113(Top 97%)11113(Top 228%)
Half13.11 mi0.68 mi26199+2111164+1611164+1625442(Top 96%)10756(Top 94%)10756(Top 220%)
25K15.53 mi2.42 mi26254-5511195-3111195-3126380(Top 99%)11291(Top 99%)11291(Top 231%)
30K18.64 mi3.11 mi26218+3611179+1611179+1625989(Top 98%)11096(Top 97%)11096(Top 227%)
20M20.00 mi1.36 mi26202+1611177+211177+225970(Top 98%)11108(Top 97%)11108(Top 227%)
21M21.00 mi1.00 mi26199+311176+111176+125951(Top 97%)11083(Top 97%)11083(Top 227%)
35K21.75 mi0.75 mi26203-411183-711183-726051(Top 98%)11159(Top 98%)11159(Top 228%)
23M23.00 mi1.25 mi26193+1011182+111182+125729(Top 97%)11016(Top 96%)11016(Top 226%)
24M24.00 mi1.00 mi26167+2611167+1511167+1525009(Top 94%)10689(Top 94%)10689(Top 219%)
40K24.85 mi0.85 mi26154+1311159+811159+825678(Top 96%)11014(Top 96%)11014(Top 226%)
25.2M25.20 mi0.35 mi26151+3111591115925338(Top 95%)10850(Top 95%)10850(Top 222%)
Finish26.22 mi1.02 mi26135+1611154+511154+525530(Top 96%)10935(Top 96%)10935(Top 224%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21story building
+97ft-345ft

Overall

26428

Females

11316

F18-39

11316

5K→10K

3.1 - 6.2 mi

Top 97%
×5story building
+79ft-138ft

Overall

25776

Females

10898

F18-39

10898

10K→15K

6.2 - 9.3 mi

Top 99%
×3story building
+67ft-78ft

Overall

26428

Females

11316

F18-39

11316

15K→20K

9.3 - 12.4 mi

Top 98%
×5story building
+106ft-86ft

Overall

26099

Females

11113

F18-39

11113

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

25442

Females

10756

F18-39

10756

Half→25K

13.1 - 15.5 mi

Top 99%
×4story building
+66ft-88ft

Overall

26380

Females

11291

F18-39

11291

25K→30K

15.5 - 18.6 mi

Top 98%
×9story building
+181ft-148ft

Overall

25989

Females

11096

F18-39

11096

30K→20M

18.6 - 20.0 mi

Top 98%
×5story building
+64ft-50ft

Overall

25970

Females

11108

F18-39

11108

20M→21M

20.0 - 21.0 mi

Top 97%
×8story building
+106ft-24ft

Overall

25951

Females

11083

F18-39

11083

21M→35K

21.0 - 21.8 mi

Top 98%
×7story building
+17ft-86ft

Overall

26051

Females

11159

F18-39

11159

35K→23M

21.8 - 23.0 mi

Top 97%
×5story building
+23ft-63ft

Overall

25729

Females

11016

F18-39

11016

23M→24M

23.0 - 24.0 mi

Top 94%
×6story building
+12ft-82ft

Overall

25009

Females

10689

F18-39

10689

24M→40K

24.0 - 24.9 mi

Top 96%
×1story
+6ft-20ft

Overall

25678

Females

11014

F18-39

11014

40K→25.2M

24.9 - 25.2 mi

Top 95%
×1story
+13ft-16ft

Overall

25338

Females

10850

F18-39

10850

25.2M→Finish

25.2 - 26.2 mi

Top 96%
×2story building
+22ft-21ft

Overall

25530

Females

10935

F18-39

10935

Passing Analysis

Category:
Athletes Passed
554
Passed By
355
Net Change
+199
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26334
5K → 10K2468+238#26334#26096
10K → 15K13170-157#26096#26253
15K → 20K6128+33#26253#26220
20K → Half254+21#26220#26199
Half → 25K1166-55#26199#26254
25K → 30K5519+36#26254#26218
30K → 20M248+16#26218#26202
20M → 21M1512+3#26202#26199
21M → 35K913-4#26199#26203
35K → 23M199+10#26203#26193
23M → 24M282+26#26193#26167
24M → 40K218+13#26167#26154
40K → 25.2M63+3#26154#26151
25.2M → Finish215+16#26151#26135
TOTALS554355+199
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing