Boston Marathon logo
BOSTON MARATHON 2023

Monica Johnson

Bib: 18592•F

FL

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:37
Rank: #19948
Start → 5K
27:37 | 8:53/mi
10K· 6.21 mi
55:10
Rank: #20082 (-134)
5K → 10K
27:33 | 8:52/mi
15K· 9.32 mi
1:23:04
Rank: #20178 (-96)
10K → 15K
27:54 | 8:59/mi
20K· 12.43 mi
1:56:51
Rank: #21818 (-1640)
15K → 20K
33:47 | 10:52/mi
Half· 13.11 mi
2:02:59
Rank: #21751 (+67)
20K → Half
6:08 | 8:59/mi
25K· 15.53 mi
2:25:15
Rank: #21447 (+304)
Half → 25K
22:16 | 9:11/mi
30K· 18.64 mi
2:55:10
Rank: #21173 (+274)
25K → 30K
29:55 | 9:38/mi
20M
3:08:36
Rank: #21061 (+112)
30K → 20M
13:26 | 9:53/mi
21M
3:19:24
Rank: #21005 (+56)
20M → 21M
10:48 | 10:48/mi
35K· 21.75 mi
3:29:47
Rank: #21444 (-439)
21M → 35K
10:23 | 13:53/mi
23M
3:41:45
Rank: #21258 (+186)
35K → 23M
11:58 | 9:33/mi
24M
3:51:02
Rank: #21132 (+126)
23M → 24M
9:17 | 9:17/mi
40K· 24.85 mi
3:59:10
Rank: #21027 (+105)
24M → 40K
8:08 | 9:31/mi
25.2M
4:02:41
Rank: #20969 (+58)
40K → 25.2M
3:31 | 10:12/mi
Finish· 26.22 mi
4:11:45
Rank: #20850 (+119)
25.2M → Finish
9:04 | 8:54/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
Time2:02:59
Pace9:23 /mi
2nd Half
Distance13.11 mi
Time2:08:46
Pace9:49 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:5527:378:5327:37
8:53
-
10K
6.21 mi11:51:2855:108:5327:33
8:52
-0:01
15K
9.32 mi12:19:221:23:048:5527:54
8:59
+0:07
20K
12.43 mi12:53:091:56:519:2433:47
10:52
+1:53
Half
13.11 mi12:59:172:02:599:236:08
8:59
-1:53
25K
15.53 mi13:21:332:25:159:2122:16
9:11
+0:12
30K
18.64 mi13:51:282:55:109:2429:55
9:38
+0:27
20M
20.00 mi14:04:543:08:369:2613:26
9:53
+0:15
21M
21.00 mi14:15:423:19:249:3010:48
10:48
+0:55
35K
21.75 mi14:26:053:29:479:3910:23
13:53
+3:05
23M
23.00 mi14:38:033:41:459:3811:58
9:33
-4:20
24M
24.00 mi14:47:203:51:029:389:17
9:17
-0:16
40K
24.85 mi14:55:283:59:109:378:08
9:31
+0:14
25.2M
25.20 mi14:58:594:02:419:383:31
10:12
+0:41
Finish
26.22 mi15:08:034:11:459:379:04
8:54
-1:18

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

8:52 /mi

Average Pace

9:37 /mi

Slowest Pace

13:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

55:10

22% of race

Time at Steady Pace

2:18:06

55% of race

Time at Slower Pace

58:29

23% of race

Average Pace: 9:36 /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 mi11:23:5527:378:5327:37
8:53
#19948
10K
6.21 mi11:51:2855:108:5327:33
8:52
#20082
15K
9.32 mi12:19:221:23:048:5527:54
8:59
#20178
20K
12.43 mi12:53:091:56:519:2433:47
10:52
#21818
Half
13.11 mi12:59:172:02:599:236:08
8:59
#21751
25K
15.53 mi13:21:332:25:159:2122:16
9:11
#21447
30K
18.64 mi13:51:282:55:109:2429:55
9:38
#21173
20M
20.00 mi14:04:543:08:369:2613:26
9:53
#21061
21M
21.00 mi14:15:423:19:249:3010:48
10:48
#21005
35K
21.75 mi14:26:053:29:479:3910:23
13:53
#21444
23M
23.00 mi14:38:033:41:459:3811:58
9:33
#21258
24M
24.00 mi14:47:203:51:029:389:17
9:17
#21132
40K
24.85 mi14:55:283:59:109:378:08
9:31
#21027
25.2M
25.20 mi14:58:594:02:419:383:31
10:12
#20969
Finish
26.22 mi15:08:034:11:459:379:04
8:54
#20850
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi199487781778120422(Top 77%)7913(Top 69%)7913(Top 162%)
10K6.21 mi3.10 mi20082-1347814-337814-3320283(Top 76%)7864(Top 69%)7864(Top 161%)
15K9.32 mi3.11 mi20178-967835-217835-2120422(Top 77%)7913(Top 69%)7913(Top 162%)
20K12.43 mi3.11 mi21818-16408722-8878722-88724431(Top 92%)10164(Top 89%)10164(Top 208%)
Half13.11 mi0.68 mi21751+678683+398683+3920444(Top 77%)7942(Top 70%)7942(Top 163%)
25K15.53 mi2.42 mi21447+3048514+1698514+16919782(Top 74%)7580(Top 66%)7580(Top 155%)
30K18.64 mi3.11 mi21173+2748377+1378377+13719906(Top 75%)7713(Top 68%)7713(Top 158%)
20M20.00 mi1.36 mi21061+1128333+448333+4420150(Top 76%)7953(Top 70%)7953(Top 163%)
21M21.00 mi1.00 mi21005+568313+208313+2020390(Top 77%)8141(Top 71%)8141(Top 167%)
35K21.75 mi0.75 mi21444-4398558-2458558-24526082(Top 98%)11177(Top 98%)11177(Top 229%)
23M23.00 mi1.25 mi21258+1868478+808478+8018582(Top 70%)7181(Top 63%)7181(Top 147%)
24M24.00 mi1.00 mi21132+1268419+598419+5918424(Top 69%)7131(Top 62%)7131(Top 146%)
40K24.85 mi0.85 mi21027+1058373+468373+4618407(Top 69%)7167(Top 63%)7167(Top 147%)
25.2M25.20 mi0.35 mi20969+588343+308343+3018187(Top 68%)7067(Top 62%)7067(Top 145%)
Finish26.22 mi1.02 mi20850+1198285+588285+5817523(Top 66%)6674(Top 58%)6674(Top 137%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21stories
+97ft-345ft

Overall

20422

Females

7913

F18-39

7913

5K→10K

3.1 - 6.2 mi

Top 76%
×5stories
+79ft-138ft

Overall

20283

Females

7864

F18-39

7864

10K→15K

6.2 - 9.3 mi

Top 77%
×3stories
+67ft-78ft

Overall

20422

Females

7913

F18-39

7913

15K→20K

9.3 - 12.4 mi

Top 92%
×5stories
+106ft-86ft

Overall

24431

Females

10164

F18-39

10164

20K→Half

12.4 - 13.1 mi

Top 77%
×2stories
+19ft-37ft

Overall

20444

Females

7942

F18-39

7942

Half→25K

13.1 - 15.5 mi

Top 74%
×4stories
+66ft-88ft

Overall

19782

Females

7580

F18-39

7580

25K→30K

15.5 - 18.6 mi

Top 75%
×9stories
+181ft-148ft

Overall

19906

Females

7713

F18-39

7713

30K→20M

18.6 - 20.0 mi

Top 76%
×5stories
+64ft-50ft

Overall

20150

Females

7953

F18-39

7953

20M→21M

20.0 - 21.0 mi

Top 77%
×8stories
+106ft-24ft

Overall

20390

Females

8141

F18-39

8141

21M→35K

21.0 - 21.8 mi

Top 98%
×7stories
+17ft-86ft

Overall

26082

Females

11177

F18-39

11177

35K→23M

21.8 - 23.0 mi

Top 70%
×5stories
+23ft-63ft

Overall

18582

Females

7181

F18-39

7181

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

18424

Females

7131

F18-39

7131

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

18407

Females

7167

F18-39

7167

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

18187

Females

7067

F18-39

7067

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2stories
+22ft-21ft

Overall

17523

Females

6674

F18-39

6674

Passing Analysis

Category:
Athletes Passed
1897
Passed By
2799
Net Change
-902
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19948
5K → 10K240374-134#19948#20082
10K → 15K136232-96#20082#20178
15K → 20K51645-1640#20178#21818
20K → Half736+67#21818#21751
Half → 25K3051+304#21751#21447
25K → 30K30430+274#21447#21173
30K → 20M12513+112#21173#21061
20M → 21M9236+56#21061#21005
21M → 35K4443-439#21005#21444
35K → 23M1893+186#21444#21258
23M → 24M1271+126#21258#21132
24M → 40K1083+105#21132#21027
40K → 25.2M602+58#21027#20969
25.2M → Finish12910+119#20969#20850
TOTALS18972799-902
📊

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