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BOSTON MARATHON 2023

Sanna Nilsson

Bib: 17260•F

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 33%
Gender (Female)
#0 / 11423
Top 14%
Division (F18-39)
#0 / 4884
Top 26%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:32
Rank: #13210
Start → 5K
24:32 | 7:54/mi
10K· 6.21 mi
48:43
Rank: #13088 (+122)
5K → 10K
24:11 | 7:47/mi
15K· 9.32 mi
1:12:31
Rank: #12498 (+590)
10K → 15K
23:48 | 7:40/mi
20K· 12.43 mi
1:36:24
Rank: #12022 (+476)
15K → 20K
23:53 | 7:41/mi
Half· 13.11 mi
1:41:34
Rank: #11966 (+56)
20K → Half
5:10 | 7:34/mi
25K· 15.53 mi
2:00:03
Rank: #11516 (+450)
Half → 25K
18:29 | 7:37/mi
30K· 18.64 mi
2:23:42
Rank: #10846 (+670)
25K → 30K
23:39 | 7:37/mi
20M
2:33:59
Rank: #10543 (+303)
30K → 20M
10:17 | 7:34/mi
21M
2:41:41
Rank: #10211 (+332)
20M → 21M
7:42 | 7:42/mi
35K· 21.75 mi
2:46:53
Rank: #9969 (+242)
21M → 35K
5:12 | 6:57/mi
23M
2:55:55
Rank: #9597 (+372)
35K → 23M
9:02 | 7:13/mi
24M
3:02:59
Rank: #9334 (+263)
23M → 24M
7:04 | 7:04/mi
40K· 24.85 mi
3:09:06
Rank: #9121 (+213)
24M → 40K
6:07 | 7:09/mi
25.2M
3:11:46
Rank: #9053 (+68)
40K → 25.2M
2:40 | 7:44/mi
Finish· 26.22 mi
3:19:00
Rank: #8885 (+168)
25.2M → Finish
7:14 | 7:06/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:41:34
Pace7:45 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:37:26
Pace7:26 /mi
📊Negative Split: 4.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:0224:327:5424:32
7:54
-
10K
6.21 mi11:39:1348:437:5024:11
7:47
-0:07
15K
9.32 mi12:03:011:12:317:4723:48
7:40
-0:07
20K
12.43 mi12:26:541:36:247:4523:53
7:41
+0:01
Half
13.11 mi12:32:041:41:347:455:10
7:34
-0:07
25K
15.53 mi12:50:332:00:037:4418:29
7:37
+0:03
30K
18.64 mi13:14:122:23:427:4323:39
7:37
0:00
20M
20.00 mi13:24:292:33:597:4210:17
7:34
-0:03
21M
21.00 mi13:32:112:41:417:427:42
7:42
+0:08
35K
21.75 mi13:37:232:46:537:405:12
6:57
-0:45
23M
23.00 mi13:46:252:55:557:399:02
7:13
+0:16
24M
24.00 mi13:53:293:02:597:377:04
7:04
-0:09
40K
24.85 mi13:59:363:09:067:366:07
7:09
+0:05
25.2M
25.20 mi14:02:163:11:467:372:40
7:44
+0:35
Finish
26.22 mi14:09:303:19:007:367:14
7:06
-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

6:57 /mi

Average Pace

7:36 /mi

Slowest Pace

7:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:32:14

46% of race

Time at Steady Pace

1:46:46

54% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:35 /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 mi11:15:0224:327:5424:32
7:54
#13210
10K
6.21 mi11:39:1348:437:5024:11
7:47
#13088
15K
9.32 mi12:03:011:12:317:4723:48
7:40
#12498
20K
12.43 mi12:26:541:36:247:4523:53
7:41
#12022
Half
13.11 mi12:32:041:41:347:455:10
7:34
#11966
25K
15.53 mi12:50:332:00:037:4418:29
7:37
#11516
30K
18.64 mi13:14:122:23:427:4323:39
7:37
#10846
20M
20.00 mi13:24:292:33:597:4210:17
7:34
#10543
21M
21.00 mi13:32:112:41:417:427:42
7:42
#10211
35K
21.75 mi13:37:232:46:537:405:12
6:57
#9969
23M
23.00 mi13:46:252:55:557:399:02
7:13
#9597
24M
24.00 mi13:53:293:02:597:377:04
7:04
#9334
40K
24.85 mi13:59:363:09:067:366:07
7:09
#9121
25.2M
25.20 mi14:02:163:11:467:372:40
7:44
#9053
Finish
26.22 mi14:09:303:19:007:367:14
7:06
#8885
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi132103554355411506(Top 43%)2628(Top 23%)2628(Top 54%)
10K6.21 mi3.10 mi13088+1223494+603494+6012987(Top 49%)3416(Top 30%)3416(Top 70%)
15K9.32 mi3.11 mi12498+5903171+3233171+32311506(Top 43%)2628(Top 23%)2628(Top 54%)
20K12.43 mi3.11 mi12022+4762923+2482923+24810823(Top 41%)2318(Top 20%)2318(Top 47%)
Half13.11 mi0.68 mi11966+562894+292894+2910835(Top 41%)2264(Top 20%)2264(Top 46%)
25K15.53 mi2.42 mi11516+4502646+2482646+2489737(Top 37%)1879(Top 16%)1879(Top 38%)
30K18.64 mi3.11 mi10846+6702322+3242322+3248031(Top 30%)1325(Top 12%)1325(Top 27%)
20M20.00 mi1.36 mi10543+3032195+1272195+1277308(Top 27%)1146(Top 10%)1146(Top 23%)
21M21.00 mi1.00 mi10211+3322049+1462049+1465655(Top 21%)716(Top 6%)716(Top 15%)
35K21.75 mi0.75 mi9969+2421953+961953+965118(Top 19%)544(Top 5%)544(Top 11%)
23M23.00 mi1.25 mi9597+3721818+1351818+1354911(Top 18%)514(Top 4%)514(Top 11%)
24M24.00 mi1.00 mi9334+2631725+931725+935057(Top 19%)595(Top 5%)595(Top 12%)
40K24.85 mi0.85 mi9121+2131666+591666+594686(Top 18%)568(Top 5%)568(Top 12%)
25.2M25.20 mi0.35 mi9053+681642+241642+245149(Top 19%)794(Top 7%)794(Top 16%)
Finish26.22 mi1.02 mi8885+1681597+451597+455847(Top 22%)1023(Top 9%)1023(Top 21%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21stories
+97ft-345ft

Overall

11506

Females

2628

F18-39

2628

5K→10K

3.1 - 6.2 mi

Top 49%
×5stories
+79ft-138ft

Overall

12987

Females

3416

F18-39

3416

10K→15K

6.2 - 9.3 mi

Top 43%
×3stories
+67ft-78ft

Overall

11506

Females

2628

F18-39

2628

15K→20K

9.3 - 12.4 mi

Top 41%
×5stories
+106ft-86ft

Overall

10823

Females

2318

F18-39

2318

20K→Half

12.4 - 13.1 mi

Top 41%
×2stories
+19ft-37ft

Overall

10835

Females

2264

F18-39

2264

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

9737

Females

1879

F18-39

1879

25K→30K

15.5 - 18.6 mi

Top 30%
×9stories
+181ft-148ft

Overall

8031

Females

1325

F18-39

1325

30K→20M

18.6 - 20.0 mi

Top 27%
×5stories
+64ft-50ft

Overall

7308

Females

1146

F18-39

1146

20M→21M

20.0 - 21.0 mi

Top 21%
×8stories
+106ft-24ft

Overall

5655

Females

716

F18-39

716

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

5118

Females

544

F18-39

544

35K→23M

21.8 - 23.0 mi

Top 18%
×5stories
+23ft-63ft

Overall

4911

Females

514

F18-39

514

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5057

Females

595

F18-39

595

24M→40K

24.0 - 24.9 mi

Top 18%
×1story
+6ft-20ft

Overall

4686

Females

568

F18-39

568

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5149

Females

794

F18-39

794

25.2M→Finish

25.2 - 26.2 mi

Top 22%
×2stories
+22ft-21ft

Overall

5847

Females

1023

F18-39

1023

Passing Analysis

Category:
Athletes Passed
4670*
Passed By
345
Net Change
+4325
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13210
5K → 10K374252+122#13210#13088
10K → 15K63444+590#13088#12498
15K → 20K49721+476#12498#12022
20K → Half637+56#12022#11966
Half → 25K4533+450#11966#11516
25K → 30K6744+670#11516#10846
30K → 20M305*2+303#10846#10543
20M → 21M3320+332#10543#10211
21M → 35K242*0+242#10211#9969
35K → 23M3731+372#9969#9597
23M → 24M2652+263#9597#9334
24M → 40K2141+213#9334#9121
40K → 25.2M680+68#9121#9053
25.2M → Finish1768+168#9053#8885
TOTALS4670*345+4325

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

📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing