Boston Marathon logo
BOSTON MARATHON 2023

Emily Massey

Bib: 12833 F AU

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 25%
Gender (Female)
#0 / 11423
Top 7%
Division (F18-39)
#0 / 4884
Top 13%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:34/mi
23:30
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:21/mi
46:21
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:21/mi
1:09:11
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:19/mi
1:31:55
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:14/mi
1:36:51
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:16/mi
1:54:28
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:20/mi
2:17:14
↑ 181↓ 1480.2%
138 ft elev
20M
7:12/mi
2:27:01
↑ 64↓ 500.2%
148 ft elev
21M
7:28/mi
2:34:29
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
6:49/mi
2:39:35
↑ 17↓ 861.7%
156 ft elev
23M
7:03/mi
2:48:25
↑ 23↓ 630.6%
116 ft elev
24M
6:55/mi
2:55:20
↓ 821.3%
34 ft elev
40K· 24.85 mi
6:58/mi
3:01:17
↓ 200.3%
20 ft elev
25.2M
7:27/mi
3:03:51
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
6:48/mi
3:10:47
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

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
Time1:36:51
Pace7:23 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:33:56
Pace7:10 /mi
📊Negative Split: 3.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:1023:307:3423:30
7:34
-
10K
6.21 mi11:14:0146:217:2822:51
7:21
-0:13
15K
9.32 mi11:36:511:09:117:2522:50
7:21
0:00
20K
12.43 mi11:59:351:31:557:2422:44
7:19
-0:02
Half
13.11 mi12:04:311:36:517:234:56
7:14
-0:05
25K
15.53 mi12:22:081:54:287:2217:37
7:16
+0:02
30K
18.64 mi12:44:542:17:147:2222:46
7:20
+0:04
20M
20.00 mi12:54:412:27:017:219:47
7:12
-0:08
21M
21.00 mi13:02:092:34:297:217:28
7:28
+0:16
35K
21.75 mi13:07:152:39:357:205:06
6:49
-0:39
23M
23.00 mi13:16:052:48:257:198:50
7:03
+0:14
24M
24.00 mi13:23:002:55:207:186:55
6:55
-0:08
40K
24.85 mi13:28:573:01:177:185:57
6:58
+0:03
25.2M
25.20 mi13:31:313:03:517:182:34
7:27
+0:29
Finish
26.22 mi13:38:273:10:477:176:56
6:48
-0:39

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

6:48 /mi

Average Pace

7:17 /mi

Slowest Pace

7:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:17

88% of race

Time at Steady Pace

23:30

12% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:17 /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 mi10:51:1023:307:3423:30
7:34
#10207
10K
6.21 mi11:14:0146:217:2822:51
7:21
#9657
15K
9.32 mi11:36:511:09:117:2522:50
7:21
#9377
20K
12.43 mi11:59:351:31:557:2422:44
7:19
#8975
Half
13.11 mi12:04:311:36:517:234:56
7:14
#8912
25K
15.53 mi12:22:081:54:287:2217:37
7:16
#8585
30K
18.64 mi12:44:542:17:147:2222:46
7:20
#8096
20M
20.00 mi12:54:412:27:017:219:47
7:12
#7804
21M
21.00 mi13:02:092:34:297:217:28
7:28
#7571
35K
21.75 mi13:07:152:39:357:205:06
6:49
#7429
23M
23.00 mi13:16:052:48:257:198:50
7:03
#7171
24M
24.00 mi13:23:002:55:207:186:55
6:55
#6985
40K
24.85 mi13:28:573:01:177:185:57
6:58
#6811
25.2M
25.20 mi13:31:313:03:517:182:34
7:27
#6735
Finish
26.22 mi13:38:273:10:477:176:56
6:48
#6590
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10207195019508938(Top 34%)1419(Top 12%)1419(Top 29%)
10K6.21 mi3.10 mi9657+5501684+2661684+2669270(Top 35%)1525(Top 13%)1525(Top 31%)
15K9.32 mi3.11 mi9377+2801568+1161568+1168938(Top 34%)1419(Top 12%)1419(Top 29%)
20K12.43 mi3.11 mi8975+4021430+1381430+1387918(Top 30%)1073(Top 9%)1073(Top 22%)
Half13.11 mi0.68 mi8912+631408+221408+228117(Top 30%)1123(Top 10%)1123(Top 23%)
25K15.53 mi2.42 mi8585+3271291+1171291+1177075(Top 27%)857(Top 8%)857(Top 18%)
30K18.64 mi3.11 mi8096+4891153+1381153+1386200(Top 23%)682(Top 6%)682(Top 14%)
20M20.00 mi1.36 mi7804+2921059+941059+945127(Top 19%)486(Top 4%)486(Top 10%)
21M21.00 mi1.00 mi7571+233998+61998+614452(Top 17%)394(Top 3%)394(Top 8%)
35K21.75 mi0.75 mi7429+142960+38960+384366(Top 16%)375(Top 3%)375(Top 8%)
23M23.00 mi1.25 mi7171+258891+69891+694100(Top 15%)339(Top 3%)339(Top 7%)
24M24.00 mi1.00 mi6985+186857+34857+344293(Top 16%)400(Top 4%)400(Top 8%)
40K24.85 mi0.85 mi6811+174823+34823+343668(Top 14%)351(Top 3%)351(Top 7%)
25.2M25.20 mi0.35 mi6735+76805+18805+183711(Top 14%)389(Top 3%)389(Top 8%)
Finish26.22 mi1.02 mi6590+145777+28777+284121(Top 15%)488(Top 4%)488(Top 10%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

8938

Females

1419

F18-39

1419

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9270

Females

1525

F18-39

1525

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

8938

Females

1419

F18-39

1419

15K→20K

9.3 - 12.4 mi

Top 30%
×5story building
+106ft-86ft

Overall

7918

Females

1073

F18-39

1073

20K→Half

12.4 - 13.1 mi

Top 30%
×2story building
+19ft-37ft

Overall

8117

Females

1123

F18-39

1123

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7075

Females

857

F18-39

857

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6200

Females

682

F18-39

682

30K→20M

18.6 - 20.0 mi

Top 19%
×5story building
+64ft-50ft

Overall

5127

Females

486

F18-39

486

20M→21M

20.0 - 21.0 mi

Top 17%
×8story building
+106ft-24ft

Overall

4452

Females

394

F18-39

394

21M→35K

21.0 - 21.8 mi

Top 16%
×7story building
+17ft-86ft

Overall

4366

Females

375

F18-39

375

35K→23M

21.8 - 23.0 mi

Top 15%
×5story building
+23ft-63ft

Overall

4100

Females

339

F18-39

339

23M→24M

23.0 - 24.0 mi

Top 16%
×6story building
+12ft-82ft

Overall

4293

Females

400

F18-39

400

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

3668

Females

351

F18-39

351

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

3711

Females

389

F18-39

389

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2story building
+22ft-21ft

Overall

4121

Females

488

F18-39

488

Passing Analysis

Category:
Athletes Passed
3814*
Passed By
197
Net Change
+3617
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10207
5K → 10K659*109+550#10207#9657
10K → 15K33151+280#9657#9377
15K → 20K41210+402#9377#8975
20K → Half696+63#8975#8912
Half → 25K3336+327#8912#8585
25K → 30K4945+489#8585#8096
30K → 20M2942+292#8096#7804
20M → 21M2330+233#7804#7571
21M → 35K1431+142#7571#7429
35K → 23M2580+258#7429#7171
23M → 24M1871+186#7171#6985
24M → 40K1751+174#6985#6811
40K → 25.2M771+76#6811#6735
25.2M → Finish1494+145#6735#6590
TOTALS3814*197+3617

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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