Boston Marathon logo
BOSTON MARATHON 2023

Rebecca Clarke

Bib: 5356•F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 13%
Gender (Female)
#0 / 11423
Top 2%
Division (F18-39)
#0 / 4884
Top 3%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:48
Rank: #3644
Start → 5K
20:48 | 6:42/mi
10K· 6.21 mi
41:30
Rank: #3774 (-130)
5K → 10K
20:42 | 6:40/mi
15K· 9.32 mi
1:02:04
Rank: #3633 (+141)
10K → 15K
20:34 | 6:37/mi
20K· 12.43 mi
1:22:48
Rank: #3540 (+93)
15K → 20K
20:44 | 6:40/mi
Half· 13.11 mi
1:27:19
Rank: #3542 (-2)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:43:40
Rank: #3544 (-2)
Half → 25K
16:21 | 6:45/mi
30K· 18.64 mi
2:05:12
Rank: #3590 (-46)
25K → 30K
21:32 | 6:56/mi
20M
2:14:46
Rank: #3605 (-15)
30K → 20M
9:34 | 7:02/mi
21M
2:22:18
Rank: #3670 (-65)
20M → 21M
7:32 | 7:32/mi
35K· 21.75 mi
2:27:19
Rank: #3653 (+17)
21M → 35K
5:01 | 6:42/mi
23M
2:36:06
Rank: #3623 (+30)
35K → 23M
8:47 | 7:01/mi
24M
2:42:49
Rank: #3592 (+31)
23M → 24M
6:43 | 6:43/mi
40K· 24.85 mi
2:48:48
Rank: #3580 (+12)
24M → 40K
5:59 | 7:00/mi
25.2M
2:51:20
Rank: #3559 (+21)
40K → 25.2M
2:32 | 7:21/mi
Finish· 26.22 mi
2:58:11
Rank: #3553 (+6)
25.2M → Finish
6:51 | 6:43/mi

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
Time1:27:19
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:30:52
Pace6:56 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:4320:486:4220:48
6:42
-
10K
6.21 mi10:44:2541:306:4120:42
6:40
-0:02
15K
9.32 mi11:04:591:02:046:4020:34
6:37
-0:03
20K
12.43 mi11:25:431:22:486:4020:44
6:40
+0:03
Half
13.11 mi11:30:141:27:196:404:31
6:37
-0:03
25K
15.53 mi11:46:351:43:406:4016:21
6:45
+0:08
30K
18.64 mi12:08:072:05:126:4321:32
6:56
+0:11
20M
20.00 mi12:17:412:14:466:449:34
7:02
+0:06
21M
21.00 mi12:25:132:22:186:477:32
7:32
+0:30
35K
21.75 mi12:30:142:27:196:465:01
6:42
-0:50
23M
23.00 mi12:39:012:36:066:478:47
7:01
+0:19
24M
24.00 mi12:45:442:42:496:476:43
6:43
-0:18
40K
24.85 mi12:51:432:48:486:475:59
7:00
+0:17
25.2M
25.20 mi12:54:152:51:206:482:32
7:21
+0:21
Finish
26.22 mi13:01:062:58:116:486:51
6:43
-0:38

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

6:37 /mi

Average Pace

6:48 /mi

Slowest Pace

7:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:07

94% of race

Time at Steady Pace

10:04

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:48 /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 mi10:23:4320:486:4220:48
6:42
#3644
10K
6.21 mi10:44:2541:306:4120:42
6:40
#3774
15K
9.32 mi11:04:591:02:046:4020:34
6:37
#3633
20K
12.43 mi11:25:431:22:486:4020:44
6:40
#3540
Half
13.11 mi11:30:141:27:196:404:31
6:37
#3542
25K
15.53 mi11:46:351:43:406:4016:21
6:45
#3544
30K
18.64 mi12:08:072:05:126:4321:32
6:56
#3590
20M
20.00 mi12:17:412:14:466:449:34
7:02
#3605
21M
21.00 mi12:25:132:22:186:477:32
7:32
#3670
35K
21.75 mi12:30:142:27:196:465:01
6:42
#3653
23M
23.00 mi12:39:012:36:066:478:47
7:01
#3623
24M
24.00 mi12:45:442:42:496:476:43
6:43
#3592
40K
24.85 mi12:51:432:48:486:475:59
7:00
#3580
25.2M
25.20 mi12:54:152:51:206:482:32
7:21
#3559
Finish
26.22 mi13:01:062:58:116:486:51
6:43
#3553
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi36442082083468(Top 13%)177(Top 2%)177(Top 4%)
10K6.21 mi3.10 mi3774-130215-7215-74006(Top 15%)233(Top 2%)233(Top 5%)
15K9.32 mi3.11 mi3633+141197+18197+183468(Top 13%)177(Top 2%)177(Top 4%)
20K12.43 mi3.11 mi3540+93186+11186+113375(Top 13%)174(Top 2%)174(Top 4%)
Half13.11 mi0.68 mi3542-2184+2184+23681(Top 14%)200(Top 2%)200(Top 4%)
25K15.53 mi2.42 mi3544-2181+3181+33720(Top 14%)216(Top 2%)216(Top 4%)
30K18.64 mi3.11 mi3590-46190-9190-93889(Top 15%)245(Top 2%)245(Top 5%)
20M20.00 mi1.36 mi3605-15192-2192-24290(Top 16%)328(Top 3%)328(Top 7%)
21M21.00 mi1.00 mi3670-65200-8200-84764(Top 18%)457(Top 4%)457(Top 9%)
35K21.75 mi0.75 mi3653+17202-2202-23649(Top 14%)266(Top 2%)266(Top 5%)
23M23.00 mi1.25 mi3623+30199+3199+33889(Top 15%)303(Top 3%)303(Top 6%)
24M24.00 mi1.00 mi3592+31200-1200-13235(Top 12%)236(Top 2%)236(Top 5%)
40K24.85 mi0.85 mi3580+12201-1201-13878(Top 15%)382(Top 3%)382(Top 8%)
25.2M25.20 mi0.35 mi3559+21199+2199+23256(Top 12%)286(Top 3%)286(Top 6%)
Finish26.22 mi1.02 mi3553+6205-6205-63665(Top 14%)389(Top 3%)389(Top 8%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3468

Females

177

F18-39

177

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

4006

Females

233

F18-39

233

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3468

Females

177

F18-39

177

15K→20K

9.3 - 12.4 mi

Top 13%
×5stories
+106ft-86ft

Overall

3375

Females

174

F18-39

174

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

3681

Females

200

F18-39

200

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

3720

Females

216

F18-39

216

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

3889

Females

245

F18-39

245

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4290

Females

328

F18-39

328

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

4764

Females

457

F18-39

457

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

3649

Females

266

F18-39

266

35K→23M

21.8 - 23.0 mi

Top 15%
×5stories
+23ft-63ft

Overall

3889

Females

303

F18-39

303

23M→24M

23.0 - 24.0 mi

Top 12%
×6stories
+12ft-82ft

Overall

3235

Females

236

F18-39

236

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

3878

Females

382

F18-39

382

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3256

Females

286

F18-39

286

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

3665

Females

389

F18-39

389

Passing Analysis

Category:
Athletes Passed
1049
Passed By
958
Net Change
+91
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3644
5K → 10K157287-130#3644#3774
10K → 15K18544+141#3774#3633
15K → 20K13037+93#3633#3540
20K → Half1214-2#3540#3542
Half → 25K8486-2#3542#3544
25K → 30K83129-46#3544#3590
30K → 20M5469-15#3590#3605
20M → 21M37102-65#3605#3670
21M → 35K3720+17#3670#3653
35K → 23M7343+30#3653#3623
23M → 24M6231+31#3623#3592
24M → 40K5139+12#3592#3580
40K → 25.2M265+21#3580#3559
25.2M → Finish5852+6#3559#3553
TOTALS1049958+91
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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