Boston Marathon logo
BOSTON MARATHON 2023

Margaret Knox

Bib: 11929•F

NY

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 28%
Gender (Female)
#0 / 11423
Top 9%
Division (F18-39)
#0 / 4884
Top 18%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:35
Rank: #10456
Start → 5K
23:35 | 7:35/mi
10K· 6.21 mi
46:16
Rank: #9551 (+905)
5K → 10K
22:41 | 7:18/mi
15K· 9.32 mi
1:09:07
Rank: #9321 (+230)
10K → 15K
22:51 | 7:21/mi
20K· 12.43 mi
1:31:59
Rank: #9018 (+303)
15K → 20K
22:52 | 7:22/mi
Half· 13.11 mi
1:36:56
Rank: #8969 (+49)
20K → Half
4:57 | 7:15/mi
25K· 15.53 mi
1:54:48
Rank: #8767 (+202)
Half → 25K
17:52 | 7:22/mi
30K· 18.64 mi
2:18:03
Rank: #8398 (+369)
25K → 30K
23:15 | 7:29/mi
20M
2:28:16
Rank: #8268 (+130)
30K → 20M
10:13 | 7:31/mi
21M
2:36:09
Rank: #8158 (+110)
20M → 21M
7:53 | 7:53/mi
35K· 21.75 mi
2:41:34
Rank: #8093 (+65)
21M → 35K
5:25 | 7:14/mi
23M
2:50:55
Rank: #7932 (+161)
35K → 23M
9:21 | 7:28/mi
24M
2:58:07
Rank: #7805 (+127)
23M → 24M
7:12 | 7:12/mi
40K· 24.85 mi
3:04:24
Rank: #7699 (+106)
24M → 40K
6:17 | 7:21/mi
25.2M
3:07:04
Rank: #7638 (+61)
40K → 25.2M
2:40 | 7:44/mi
Finish· 26.22 mi
3:14:11
Rank: #7508 (+130)
25.2M → Finish
7:07 | 6:59/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 Half⚖️ Balanced
Distance13.11 mi
Time1:36:56
Pace7:24 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:37:15
Pace7:25 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:1123:357:3523:35
7:35
-
10K
6.21 mi11:14:5246:167:2722:41
7:18
-0:17
15K
9.32 mi11:37:431:09:077:2522:51
7:21
+0:03
20K
12.43 mi12:00:351:31:597:2422:52
7:22
+0:01
Half
13.11 mi12:05:321:36:567:244:57
7:15
-0:07
25K
15.53 mi12:23:241:54:487:2317:52
7:22
+0:07
30K
18.64 mi12:46:392:18:037:2423:15
7:29
+0:07
20M
20.00 mi12:56:522:28:167:2510:13
7:31
+0:02
21M
21.00 mi13:04:452:36:097:267:53
7:53
+0:22
35K
21.75 mi13:10:102:41:347:265:25
7:14
-0:39
23M
23.00 mi13:19:312:50:557:269:21
7:28
+0:14
24M
24.00 mi13:26:432:58:077:257:12
7:12
-0:16
40K
24.85 mi13:33:003:04:247:256:17
7:21
+0:09
25.2M
25.20 mi13:35:403:07:047:252:40
7:44
+0:23
Finish
26.22 mi13:42:473:14:117:257:07
6:59
-0:45

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

6:59 /mi

Average Pace

7:25 /mi

Slowest Pace

7:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:03:38

95% of race

Time at Steady Pace

10:33

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:24 /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 mi10:52:1123:357:3523:35
7:35
#10456
10K
6.21 mi11:14:5246:167:2722:41
7:18
#9551
15K
9.32 mi11:37:431:09:077:2522:51
7:21
#9321
20K
12.43 mi12:00:351:31:597:2422:52
7:22
#9018
Half
13.11 mi12:05:321:36:567:244:57
7:15
#8969
25K
15.53 mi12:23:241:54:487:2317:52
7:22
#8767
30K
18.64 mi12:46:392:18:037:2423:15
7:29
#8398
20M
20.00 mi12:56:522:28:167:2510:13
7:31
#8268
21M
21.00 mi13:04:452:36:097:267:53
7:53
#8158
35K
21.75 mi13:10:102:41:347:265:25
7:14
#8093
23M
23.00 mi13:19:312:50:557:269:21
7:28
#7932
24M
24.00 mi13:26:432:58:077:257:12
7:12
#7805
40K
24.85 mi13:33:003:04:247:256:17
7:21
#7699
25.2M
25.20 mi13:35:403:07:047:252:40
7:44
#7638
Finish
26.22 mi13:42:473:14:117:257:07
6:59
#7508
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10456206120618981(Top 34%)1436(Top 13%)1436(Top 29%)
10K6.21 mi3.10 mi9551+9051632+4291632+4298874(Top 33%)1354(Top 12%)1354(Top 28%)
15K9.32 mi3.11 mi9321+2301550+821550+828981(Top 34%)1436(Top 13%)1436(Top 29%)
20K12.43 mi3.11 mi9018+3031447+1031447+1038225(Top 31%)1182(Top 10%)1182(Top 24%)
Half13.11 mi0.68 mi8969+491432+151432+158297(Top 31%)1202(Top 11%)1202(Top 25%)
25K15.53 mi2.42 mi8767+2021361+711361+717771(Top 29%)1112(Top 10%)1112(Top 23%)
30K18.64 mi3.11 mi8398+3691266+951266+957123(Top 27%)970(Top 8%)970(Top 20%)
20M20.00 mi1.36 mi8268+1301238+281238+286936(Top 26%)1004(Top 9%)1004(Top 21%)
21M21.00 mi1.00 mi8158+1101214+241214+246662(Top 25%)1005(Top 9%)1005(Top 21%)
35K21.75 mi0.75 mi8093+651200+141200+146812(Top 26%)1030(Top 9%)1030(Top 21%)
23M23.00 mi1.25 mi7932+1611160+401160+406262(Top 24%)904(Top 8%)904(Top 19%)
24M24.00 mi1.00 mi7805+1271134+261134+265779(Top 22%)820(Top 7%)820(Top 17%)
40K24.85 mi0.85 mi7699+1061111+231111+235789(Top 22%)906(Top 8%)906(Top 19%)
25.2M25.20 mi0.35 mi7638+611098+131098+135129(Top 19%)774(Top 7%)774(Top 16%)
Finish26.22 mi1.02 mi7508+1301078+201078+205140(Top 19%)777(Top 7%)777(Top 16%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21stories
+97ft-345ft

Overall

8981

Females

1436

F18-39

1436

5K→10K

3.1 - 6.2 mi

Top 33%
×5stories
+79ft-138ft

Overall

8874

Females

1354

F18-39

1354

10K→15K

6.2 - 9.3 mi

Top 34%
×3stories
+67ft-78ft

Overall

8981

Females

1436

F18-39

1436

15K→20K

9.3 - 12.4 mi

Top 31%
×5stories
+106ft-86ft

Overall

8225

Females

1182

F18-39

1182

20K→Half

12.4 - 13.1 mi

Top 31%
×2stories
+19ft-37ft

Overall

8297

Females

1202

F18-39

1202

Half→25K

13.1 - 15.5 mi

Top 29%
×4stories
+66ft-88ft

Overall

7771

Females

1112

F18-39

1112

25K→30K

15.5 - 18.6 mi

Top 27%
×9stories
+181ft-148ft

Overall

7123

Females

970

F18-39

970

30K→20M

18.6 - 20.0 mi

Top 26%
×5stories
+64ft-50ft

Overall

6936

Females

1004

F18-39

1004

20M→21M

20.0 - 21.0 mi

Top 25%
×8stories
+106ft-24ft

Overall

6662

Females

1005

F18-39

1005

21M→35K

21.0 - 21.8 mi

Top 26%
×7stories
+17ft-86ft

Overall

6812

Females

1030

F18-39

1030

35K→23M

21.8 - 23.0 mi

Top 24%
×5stories
+23ft-63ft

Overall

6262

Females

904

F18-39

904

23M→24M

23.0 - 24.0 mi

Top 22%
×6stories
+12ft-82ft

Overall

5779

Females

820

F18-39

820

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

5789

Females

906

F18-39

906

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5129

Females

774

F18-39

774

25.2M→Finish

25.2 - 26.2 mi

Top 19%
×2stories
+22ft-21ft

Overall

5140

Females

777

F18-39

777

Passing Analysis

Category:
Athletes Passed
3240*
Passed By
292
Net Change
+2948
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10456
5K → 10K956*51+905#10456#9551
10K → 15K28858+230#9551#9321
15K → 20K32825+303#9321#9018
20K → Half556+49#9018#8969
Half → 25K22523+202#8969#8767
25K → 30K38920+369#8767#8398
30K → 20M14111+130#8398#8268
20M → 21M13525+110#8268#8158
21M → 35K7914+65#8158#8093
35K → 23M17615+161#8093#7932
23M → 24M14013+127#7932#7805
24M → 40K12014+106#7805#7699
40K → 25.2M676+61#7699#7638
25.2M → Finish14111+130#7638#7508
TOTALS3240*292+2948

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

📊

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