Boston Marathon logo
BOSTON MARATHON 2023

Lindsey Swartz

Bib: 24886•F

FL

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 43%
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
8:53/mi
27:35
↑ 97↓ 3451.5%
10K· 6.21 mi
8:27/mi
53:50
↑ 79↓ 1380.4%
15K· 9.32 mi
8:22/mi
1:19:50
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:45:34
↑ 106↓ 860.1%
Half· 13.11 mi
8:05/mi
1:51:05
↑ 19↓ 370.5%
25K· 15.53 mi
8:21/mi
2:11:19
↑ 66↓ 880.2%
30K· 18.64 mi
8:31/mi
2:37:46
↑ 181↓ 1480.2%
20M
8:38/mi
2:49:30
↑ 64↓ 500.2%
21M
8:48/mi
2:58:18
↑ 106↓ 241.6%
35K· 21.75 mi
8:05/mi
3:04:21
↑ 17↓ 861.7%
23M
8:22/mi
3:14:49
↑ 23↓ 630.6%
24M
7:56/mi
3:22:45
↓ 821.3%
40K· 24.85 mi
8:03/mi
3:29:38
↓ 200.3%
25.2M
8:33/mi
3:32:35
↑ 13↓ 160.2%
Finish· 26.22 mi
7:49/mi
3:40:33
↑ 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 Half
Distance13.11 mi
Time1:51:05
Pace8:28 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:49:28
Pace8:21 /mi
📊Negative Split: 1.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:4627:358:5327:35
8:53
-
10K
6.21 mi12:15:0153:508:4026:15
8:27
-0:26
15K
9.32 mi12:41:011:19:508:3426:00
8:22
-0:05
20K
12.43 mi13:06:451:45:348:3025:44
8:17
-0:05
Half
13.11 mi13:12:161:51:058:285:31
8:05
-0:12
25K
15.53 mi13:32:302:11:198:2720:14
8:21
+0:16
30K
18.64 mi13:58:572:37:468:2826:27
8:31
+0:10
20M
20.00 mi14:10:412:49:308:2811:44
8:38
+0:07
21M
21.00 mi14:19:292:58:188:298:48
8:48
+0:10
35K
21.75 mi14:25:323:04:218:296:03
8:05
-0:43
23M
23.00 mi14:36:003:14:498:2810:28
8:22
+0:17
24M
24.00 mi14:43:563:22:458:277:56
7:56
-0:26
40K
24.85 mi14:50:493:29:388:266:53
8:03
+0:07
25.2M
25.20 mi14:53:463:32:358:262:57
8:33
+0:30
Finish
26.22 mi15:01:443:40:338:257:58
7:49
-0:44

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

7:49 /mi

Average Pace

8:25 /mi

Slowest Pace

8:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:52:26

78% of race

Time at Steady Pace

48:07

22% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:25 /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 mi11:48:4627:358:5327:35
8:53
#19889
10K
6.21 mi12:15:0153:508:4026:15
8:27
#18903
15K
9.32 mi12:41:011:19:508:3426:00
8:22
#18262
20K
12.43 mi13:06:451:45:348:3025:44
8:17
#17520
Half
13.11 mi13:12:161:51:058:285:31
8:05
#17388
25K
15.53 mi13:32:302:11:198:2720:14
8:21
#17057
30K
18.64 mi13:58:572:37:468:2826:27
8:31
#16547
20M
20.00 mi14:10:412:49:308:2811:44
8:38
#16376
21M
21.00 mi14:19:292:58:188:298:48
8:48
#16120
35K
21.75 mi14:25:323:04:218:296:03
8:05
#15987
23M
23.00 mi14:36:003:14:498:2810:28
8:22
#15738
24M
24.00 mi14:43:563:22:458:277:56
7:56
#15535
40K
24.85 mi14:50:493:29:388:266:53
8:03
#15357
25.2M
25.20 mi14:53:463:32:358:262:57
8:33
#15261
Finish
26.22 mi15:01:443:40:338:257:58
7:49
#15081
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi198897735773516966(Top 64%)5887(Top 52%)5887(Top 121%)
10K6.21 mi3.10 mi18903+9867079+6567079+65617926(Top 67%)6434(Top 56%)6434(Top 132%)
15K9.32 mi3.11 mi18262+6416670+4096670+40916966(Top 64%)5887(Top 52%)5887(Top 121%)
20K12.43 mi3.11 mi17520+7426228+4426228+44215513(Top 58%)5040(Top 44%)5040(Top 103%)
Half13.11 mi0.68 mi17388+1326154+746154+7415106(Top 57%)4751(Top 42%)4751(Top 97%)
25K15.53 mi2.42 mi17057+3315978+1765978+17615235(Top 57%)4979(Top 44%)4979(Top 102%)
30K18.64 mi3.11 mi16547+5105709+2695709+26914420(Top 54%)4577(Top 40%)4577(Top 94%)
20M20.00 mi1.36 mi16376+1715630+795630+7914508(Top 54%)4710(Top 41%)4710(Top 96%)
21M21.00 mi1.00 mi16120+2565486+1445486+14412301(Top 46%)3578(Top 31%)3578(Top 73%)
35K21.75 mi0.75 mi15987+1335426+605426+6012774(Top 48%)3881(Top 34%)3881(Top 79%)
23M23.00 mi1.25 mi15738+2495307+1195307+11912346(Top 46%)3724(Top 33%)3724(Top 76%)
24M24.00 mi1.00 mi15535+2035202+1055202+10510830(Top 41%)3009(Top 26%)3009(Top 62%)
40K24.85 mi0.85 mi15357+1785096+1065096+10610428(Top 39%)2870(Top 25%)2870(Top 59%)
25.2M25.20 mi0.35 mi15261+965044+525044+5210017(Top 38%)2733(Top 24%)2733(Top 56%)
Finish26.22 mi1.02 mi15081+1804956+884956+8810864(Top 41%)3138(Top 27%)3138(Top 64%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

16966

Females

5887

F18-39

5887

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

17926

Females

6434

F18-39

6434

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

16966

Females

5887

F18-39

5887

15K→20K

9.3 - 12.4 mi

Top 58%
×5story building
+106ft-86ft

Overall

15513

Females

5040

F18-39

5040

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

15106

Females

4751

F18-39

4751

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

15235

Females

4979

F18-39

4979

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

14420

Females

4577

F18-39

4577

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

14508

Females

4710

F18-39

4710

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

12301

Females

3578

F18-39

3578

21M→35K

21.0 - 21.8 mi

Top 48%
×7story building
+17ft-86ft

Overall

12774

Females

3881

F18-39

3881

35K→23M

21.8 - 23.0 mi

Top 46%
×5story building
+23ft-63ft

Overall

12346

Females

3724

F18-39

3724

23M→24M

23.0 - 24.0 mi

Top 41%
×6story building
+12ft-82ft

Overall

10830

Females

3009

F18-39

3009

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

10428

Females

2870

F18-39

2870

40K→25.2M

24.9 - 25.2 mi

Top 38%
×1story
+13ft-16ft

Overall

10017

Females

2733

F18-39

2733

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

10864

Females

3138

F18-39

3138

Passing Analysis

Category:
Athletes Passed
4985
Passed By
177
Net Change
+4808
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19889
5K → 10K105872+986#19889#18903
10K → 15K67433+641#18903#18262
15K → 20K7475+742#18262#17520
20K → Half1342+132#17520#17388
Half → 25K34312+331#17388#17057
25K → 30K5144+510#17057#16547
30K → 20M18716+171#16547#16376
20M → 21M2637+256#16376#16120
21M → 35K1352+133#16120#15987
35K → 23M2556+249#15987#15738
23M → 24M2085+203#15738#15535
24M → 40K1824+178#15535#15357
40K → 25.2M971+96#15357#15261
25.2M → Finish1888+180#15261#15081
TOTALS4985177+4808
📊

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