Boston Marathon logo
BOSTON MARATHON 2023

Sheri Lubniewski

Bib: 13953•F

CO

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 38%
Masters (Masters Women)
#0 / 6539
Top 25%
Division (F40-44)
#0 / 1878
Top 45%
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
8:35/mi
26:40
↑ 97↓ 3451.5%
10K· 6.21 mi
8:26/mi
52:52
↑ 79↓ 1380.4%
15K· 9.32 mi
8:14/mi
1:18:26
↑ 67↓ 78
20K· 12.43 mi
8:22/mi
1:44:26
↑ 106↓ 860.1%
Half· 13.11 mi
8:12/mi
1:50:02
↑ 19↓ 370.5%
25K· 15.53 mi
8:24/mi
2:10:24
↑ 66↓ 880.2%
30K· 18.64 mi
8:31/mi
2:36:51
↑ 181↓ 1480.2%
20M
8:32/mi
2:48:27
↑ 64↓ 500.2%
21M
8:22/mi
2:56:49
↑ 106↓ 241.6%
35K· 21.75 mi
7:37/mi
3:02:31
↑ 17↓ 861.7%
23M
7:41/mi
3:12:08
↑ 23↓ 630.6%
24M
7:39/mi
3:19:47
↓ 821.3%
40K· 24.85 mi
7:45/mi
3:26:25
↓ 200.3%
25.2M
8:22/mi
3:29:18
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:36:53
↑ 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
Time1:50:02
Pace8:24 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:46:51
Pace8:09 /mi
📊Negative Split: 2.9% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:1426:408:3526:40
8:35
-
10K
6.21 mi11:21:2652:528:3026:12
8:26
-0:09
15K
9.32 mi11:47:001:18:268:2525:34
8:14
-0:12
20K
12.43 mi12:13:001:44:268:2426:00
8:22
+0:08
Half
13.11 mi12:18:361:50:028:245:36
8:12
-0:10
25K
15.53 mi12:38:582:10:248:2420:22
8:24
+0:12
30K
18.64 mi13:05:252:36:518:2526:27
8:31
+0:07
20M
20.00 mi13:17:012:48:278:2511:36
8:32
+0:01
21M
21.00 mi13:25:232:56:498:258:22
8:22
-0:10
35K
21.75 mi13:31:053:02:318:245:42
7:37
-0:45
23M
23.00 mi13:40:423:12:088:219:37
7:41
+0:04
24M
24.00 mi13:48:213:19:478:197:39
7:39
-0:02
40K
24.85 mi13:54:593:26:258:186:38
7:45
+0:06
25.2M
25.20 mi13:57:523:29:188:182:53
8:22
+0:37
Finish
26.22 mi14:05:273:36:538:177:35
7:26
-0:56

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

7:26 /mi

Average Pace

8:17 /mi

Slowest Pace

8:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

37:11

17% of race

Time at Steady Pace

2:59:42

83% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:16 /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 mi10:55:1426:408:3526:40
8:35
#18129
10K
6.21 mi11:21:2652:528:3026:12
8:26
#17951
15K
9.32 mi11:47:001:18:268:2525:34
8:14
#17292
20K
12.43 mi12:13:001:44:268:2426:00
8:22
#16970
Half
13.11 mi12:18:361:50:028:245:36
8:12
#16901
25K
15.53 mi12:38:582:10:248:2420:22
8:24
#16697
30K
18.64 mi13:05:252:36:518:2526:27
8:31
#16240
20M
20.00 mi13:17:012:48:278:2511:36
8:32
#16050
21M
21.00 mi13:25:232:56:498:258:22
8:22
#15662
35K
21.75 mi13:31:053:02:318:245:42
7:37
#15440
23M
23.00 mi13:40:423:12:088:219:37
7:41
#15009
24M
24.00 mi13:48:213:19:478:197:39
7:39
#14737
40K
24.85 mi13:54:593:26:258:186:38
7:45
#14502
25.2M
25.20 mi13:57:523:29:188:182:53
8:22
#14412
Finish
26.22 mi14:05:273:36:538:177:35
7:26
#14154
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi181296636663616067(Top 60%)5326(Top 47%)5326(Top 284%)
10K6.21 mi3.10 mi17951+1786503+1336503+13317813(Top 67%)6374(Top 56%)6374(Top 339%)
15K9.32 mi3.11 mi17292+6596089+4146089+41416067(Top 60%)5326(Top 47%)5326(Top 284%)
20K12.43 mi3.11 mi16970+3225909+1805909+18016047(Top 60%)5375(Top 47%)5375(Top 286%)
Half13.11 mi0.68 mi16901+695867+425867+4215871(Top 60%)5203(Top 46%)5203(Top 277%)
25K15.53 mi2.42 mi16697+2045764+1035764+10315580(Top 59%)5189(Top 45%)5189(Top 276%)
30K18.64 mi3.11 mi16240+4575528+2365528+23614409(Top 54%)4566(Top 40%)4566(Top 243%)
20M20.00 mi1.36 mi16050+1905424+1045424+10413864(Top 52%)4333(Top 38%)4333(Top 231%)
21M21.00 mi1.00 mi15662+3885220+2045220+2049694(Top 36%)2250(Top 20%)2250(Top 120%)
35K21.75 mi0.75 mi15440+2225095+1255095+1259477(Top 36%)2154(Top 19%)2154(Top 115%)
23M23.00 mi1.25 mi15009+4314844+2514844+2517654(Top 29%)1442(Top 13%)1442(Top 77%)
24M24.00 mi1.00 mi14737+2724702+1424702+1428809(Top 33%)2021(Top 18%)2021(Top 108%)
40K24.85 mi0.85 mi14502+2354576+1264576+1268444(Top 32%)1934(Top 17%)1934(Top 103%)
25.2M25.20 mi0.35 mi14412+904532+444532+448799(Top 33%)2202(Top 19%)2202(Top 117%)
Finish26.22 mi1.02 mi14154+2584391+1414391+1418154(Top 31%)1918(Top 17%)1918(Top 102%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

16067

Females

5326

F40-44

5326

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

17813

Females

6374

F40-44

6374

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

16067

Females

5326

F40-44

5326

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

16047

Females

5375

F40-44

5375

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

15871

Females

5203

F40-44

5203

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

15580

Females

5189

F40-44

5189

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

14409

Females

4566

F40-44

4566

30K→20M

18.6 - 20.0 mi

Top 52%
×5story building
+64ft-50ft

Overall

13864

Females

4333

F40-44

4333

20M→21M

20.0 - 21.0 mi

Top 36%
×8story building
+106ft-24ft

Overall

9694

Females

2250

F40-44

2250

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9477

Females

2154

F40-44

2154

35K→23M

21.8 - 23.0 mi

Top 29%
×5story building
+23ft-63ft

Overall

7654

Females

1442

F40-44

1442

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8809

Females

2021

F40-44

2021

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

8444

Females

1934

F40-44

1934

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

8799

Females

2202

F40-44

2202

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8154

Females

1918

F40-44

1918

Passing Analysis

Category:
Athletes Passed
4355
Passed By
380
Net Change
+3975
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18129
5K → 10K415237+178#18129#17951
10K → 15K68728+659#17951#17292
15K → 20K37048+322#17292#16970
20K → Half767+69#16970#16901
Half → 25K23329+204#16901#16697
25K → 30K47720+457#16697#16240
30K → 20M1999+190#16240#16050
20M → 21M3880+388#16050#15662
21M → 35K2220+222#15662#15440
35K → 23M4310+431#15440#15009
23M → 24M2731+272#15009#14737
24M → 40K2350+235#14737#14502
40K → 25.2M900+90#14502#14412
25.2M → Finish2591+258#14412#14154
TOTALS4355380+3975
📊

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