Boston Marathon logo
BOSTON MARATHON 2023

Jennifer Lewis

Bib: 11753•F

OR

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 50%
Gender (Female)
#0 / 11423
Top 34%
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
7:54/mi
24:32
↑ 97↓ 3451.5%
10K· 6.21 mi
7:52/mi
48:57
↑ 79↓ 1380.4%
15K· 9.32 mi
7:45/mi
1:13:01
↑ 67↓ 78
20K· 12.43 mi
7:49/mi
1:37:18
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:42:30
↑ 19↓ 370.5%
25K· 15.53 mi
7:42/mi
2:01:09
↑ 66↓ 880.2%
30K· 18.64 mi
7:56/mi
2:25:49
↑ 181↓ 1480.2%
20M
8:03/mi
2:36:46
↑ 64↓ 500.2%
21M
9:42/mi
2:46:28
↑ 106↓ 241.6%
35K· 21.75 mi
7:51/mi
2:52:20
↑ 17↓ 861.7%
23M
9:36/mi
3:04:21
↑ 23↓ 630.6%
24M
9:07/mi
3:13:28
↓ 821.3%
40K· 24.85 mi
9:09/mi
3:21:17
↓ 200.3%
25.2M
9:46/mi
3:24:39
↑ 13↓ 160.2%
Finish· 26.22 mi
8:45/mi
3:33:34
↑ 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
Time1:42:30
Pace7:49 /mi
2nd Half
Distance13.11 mi
Time1:51:04
Pace8:28 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:1224:327:5424:32
7:54
-
10K
6.21 mi11:39:3748:577:5324:25
7:52
-0:02
15K
9.32 mi12:03:411:13:017:5024:04
7:45
-0:07
20K
12.43 mi12:27:581:37:187:5024:17
7:49
+0:04
Half
13.11 mi12:33:101:42:307:495:12
7:37
-0:12
25K
15.53 mi12:51:492:01:097:4818:39
7:42
+0:05
30K
18.64 mi13:16:292:25:497:4924:40
7:56
+0:14
20M
20.00 mi13:27:262:36:467:5010:57
8:03
+0:07
21M
21.00 mi13:37:082:46:287:569:42
9:42
+1:39
35K
21.75 mi13:43:002:52:207:555:52
7:51
-1:51
23M
23.00 mi13:55:013:04:218:0112:01
9:36
+1:45
24M
24.00 mi14:04:083:13:288:049:07
9:07
-0:29
40K
24.85 mi14:11:573:21:178:067:49
9:09
+0:02
25.2M
25.20 mi14:15:193:24:398:073:22
9:46
+0:37
Finish
26.22 mi14:24:143:33:348:098:55
8:45
-1:01

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

7:37 /mi

Average Pace

8:09 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:42:38

76% of race

Time at Slower Pace

50:56

24% of race

Average Pace: 8:09 /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 mi11:15:1224:327:5424:32
7:54
#13220
10K
6.21 mi11:39:3748:577:5324:25
7:52
#13407
15K
9.32 mi12:03:411:13:017:5024:04
7:45
#12995
20K
12.43 mi12:27:581:37:187:5024:17
7:49
#12662
Half
13.11 mi12:33:101:42:307:495:12
7:37
#12564
25K
15.53 mi12:51:492:01:097:4818:39
7:42
#12170
30K
18.64 mi13:16:292:25:497:4924:40
7:56
#11802
20M
20.00 mi13:27:262:36:467:5010:57
8:03
#11702
21M
21.00 mi13:37:082:46:287:569:42
9:42
#12081
35K
21.75 mi13:43:002:52:207:555:52
7:51
#12026
23M
23.00 mi13:55:013:04:218:0112:01
9:36
#12560
24M
24.00 mi14:04:083:13:288:049:07
9:07
#12857
40K
24.85 mi14:11:573:21:178:067:49
9:09
#13006
25.2M
25.20 mi14:15:193:24:398:073:22
9:46
#13057
Finish
26.22 mi14:24:143:33:348:098:55
8:45
#13215
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi132203564356412283(Top 46%)3070(Top 27%)3070(Top 63%)
10K6.21 mi3.10 mi13407-1873685-1213685-12113649(Top 51%)3823(Top 33%)3823(Top 78%)
15K9.32 mi3.11 mi12995+4123455+2303455+23012283(Top 46%)3070(Top 27%)3070(Top 63%)
20K12.43 mi3.11 mi12662+3333291+1643291+16411902(Top 45%)2916(Top 26%)2916(Top 60%)
Half13.11 mi0.68 mi12564+983245+463245+4611311(Top 42%)2542(Top 22%)2542(Top 52%)
25K15.53 mi2.42 mi12170+3943034+2113034+21110259(Top 39%)2122(Top 19%)2122(Top 43%)
30K18.64 mi3.11 mi11802+3682867+1672867+16710454(Top 39%)2372(Top 21%)2372(Top 49%)
20M20.00 mi1.36 mi11702+1002828+392828+3910752(Top 40%)2620(Top 23%)2620(Top 54%)
21M21.00 mi1.00 mi12081-3793056-2283056-22816846(Top 63%)6093(Top 53%)6093(Top 125%)
35K21.75 mi0.75 mi12026+553042+143042+1411023(Top 41%)2900(Top 25%)2900(Top 59%)
23M23.00 mi1.25 mi12560-5343361-3193361-31918722(Top 70%)7245(Top 63%)7245(Top 148%)
24M24.00 mi1.00 mi12857-2973564-2033564-20317733(Top 67%)6758(Top 59%)6758(Top 138%)
40K24.85 mi0.85 mi13006-1493682-1183682-11816831(Top 63%)6296(Top 55%)6296(Top 129%)
25.2M25.20 mi0.35 mi13057-513720-383720-3816376(Top 62%)6070(Top 53%)6070(Top 124%)
Finish26.22 mi1.02 mi13215-1583827-1073827-10716763(Top 63%)6226(Top 55%)6226(Top 127%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 46%
×21story building
+97ft-345ft

Overall

12283

Females

3070

F18-39

3070

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

13649

Females

3823

F18-39

3823

10K→15K

6.2 - 9.3 mi

Top 46%
×3story building
+67ft-78ft

Overall

12283

Females

3070

F18-39

3070

15K→20K

9.3 - 12.4 mi

Top 45%
×5story building
+106ft-86ft

Overall

11902

Females

2916

F18-39

2916

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11311

Females

2542

F18-39

2542

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

10259

Females

2122

F18-39

2122

25K→30K

15.5 - 18.6 mi

Top 39%
×9story building
+181ft-148ft

Overall

10454

Females

2372

F18-39

2372

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

10752

Females

2620

F18-39

2620

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

16846

Females

6093

F18-39

6093

21M→35K

21.0 - 21.8 mi

Top 41%
×7story building
+17ft-86ft

Overall

11023

Females

2900

F18-39

2900

35K→23M

21.8 - 23.0 mi

Top 70%
×5story building
+23ft-63ft

Overall

18722

Females

7245

F18-39

7245

23M→24M

23.0 - 24.0 mi

Top 67%
×6story building
+12ft-82ft

Overall

17733

Females

6758

F18-39

6758

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

16831

Females

6296

F18-39

6296

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16376

Females

6070

F18-39

6070

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2story building
+22ft-21ft

Overall

16763

Females

6226

F18-39

6226

Passing Analysis

Category:
Athletes Passed
2301
Passed By
2296
Net Change
+5
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13220
5K → 10K218405-187#13220#13407
10K → 15K47361+412#13407#12995
15K → 20K38047+333#12995#12662
20K → Half1002+98#12662#12564
Half → 25K4028+394#12564#12170
25K → 30K40436+368#12170#11802
30K → 20M14343+100#11802#11702
20M → 21M15394-379#11702#12081
21M → 35K7318+55#12081#12026
35K → 23M10544-534#12026#12560
23M → 24M17314-297#12560#12857
24M → 40K31180-149#12857#13006
40K → 25.2M1667-51#13006#13057
25.2M → Finish19177-158#13057#13215
TOTALS23012296+5
📊

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