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BOSTON MARATHON 2023

Katherine Nielson

Bib: 7735•F

TX

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 47%
Gender (Female)
#0 / 11423
Top 30%
Masters (Masters Women)
#0 / 6539
Top 17%
Division (F55-59)
#0 / 815
Top 6%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:23
Rank: #12839
Start → 5K
24:23 | 7:51/mi
10K· 6.21 mi
48:38
Rank: #12951 (-112)
5K → 10K
24:15 | 7:48/mi
15K· 9.32 mi
1:13:10
Rank: #13140 (-189)
10K → 15K
24:32 | 7:54/mi
20K· 12.43 mi
1:38:00
Rank: #13194 (-54)
15K → 20K
24:50 | 8:00/mi
Half· 13.11 mi
1:43:22
Rank: #13190 (+4)
20K → Half
5:22 | 7:52/mi
25K· 15.53 mi
2:02:56
Rank: #13179 (+11)
Half → 25K
19:34 | 8:04/mi
30K· 18.64 mi
2:28:08
Rank: #12875 (+304)
25K → 30K
25:12 | 8:07/mi
20M
2:39:16
Rank: #12736 (+139)
30K → 20M
11:08 | 8:12/mi
21M
2:48:29
Rank: #12843 (-107)
20M → 21M
9:13 | 9:13/mi
35K· 21.75 mi
2:54:27
Rank: #12798 (+45)
21M → 35K
5:58 | 7:59/mi
23M
3:04:37
Rank: #12648 (+150)
35K → 23M
10:10 | 8:07/mi
24M
3:13:08
Rank: #12743 (-95)
23M → 24M
8:31 | 8:31/mi
40K· 24.85 mi
3:20:04
Rank: #12663 (+80)
24M → 40K
6:56 | 8:07/mi
25.2M
3:23:00
Rank: #12620 (+43)
40K → 25.2M
2:56 | 8:30/mi
Finish· 26.22 mi
3:31:14
Rank: #12607 (+13)
25.2M → Finish
8:14 | 8:05/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:22
Pace7:53 /mi
2nd Half
Distance13.11 mi
Time1:47:52
Pace8:14 /mi
📊Positive Split: 4.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:28:2624:237:5124:23
7:51
-
10K
6.21 mi10:52:4148:387:5024:15
7:48
-0:03
15K
9.32 mi11:17:131:13:107:5124:32
7:54
+0:06
20K
12.43 mi11:42:031:38:007:5324:50
8:00
+0:06
Half
13.11 mi11:47:251:43:227:535:22
7:52
-0:08
25K
15.53 mi12:06:592:02:567:5519:34
8:04
+0:12
30K
18.64 mi12:32:112:28:087:5725:12
8:07
+0:03
20M
20.00 mi12:43:192:39:167:5811:08
8:12
+0:05
21M
21.00 mi12:52:322:48:298:019:13
9:13
+1:01
35K
21.75 mi12:58:302:54:278:015:58
7:59
-1:14
23M
23.00 mi13:08:403:04:378:0210:10
8:07
+0:08
24M
24.00 mi13:17:113:13:088:038:31
8:31
+0:24
40K
24.85 mi13:24:073:20:048:036:56
8:07
-0:24
25.2M
25.20 mi13:27:033:23:008:032:56
8:30
+0:23
Finish
26.22 mi13:35:173:31:148:048:14
8:05
-0:25

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

7:48 /mi

Average Pace

8:04 /mi

Slowest Pace

9:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:22:01

96% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

9:13

4% of race

Average Pace: 8:03 /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 mi10:28:2624:237:5124:23
7:51
#12839
10K
6.21 mi10:52:4148:387:5024:15
7:48
#12951
15K
9.32 mi11:17:131:13:107:5124:32
7:54
#13140
20K
12.43 mi11:42:031:38:007:5324:50
8:00
#13194
Half
13.11 mi11:47:251:43:227:535:22
7:52
#13190
25K
15.53 mi12:06:592:02:567:5519:34
8:04
#13179
30K
18.64 mi12:32:112:28:087:5725:12
8:07
#12875
20M
20.00 mi12:43:192:39:167:5811:08
8:12
#12736
21M
21.00 mi12:52:322:48:298:019:13
9:13
#12843
35K
21.75 mi12:58:302:54:278:015:58
7:59
#12798
23M
23.00 mi13:08:403:04:378:0210:10
8:07
#12648
24M
24.00 mi13:17:113:13:088:038:31
8:31
#12743
40K
24.85 mi13:24:073:20:048:036:56
8:07
#12663
25.2M
25.20 mi13:27:033:23:008:032:56
8:30
#12620
Finish
26.22 mi13:35:173:31:148:048:14
8:05
#12607
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi128393345334513509(Top 51%)3782(Top 33%)3782(Top 464%)
10K6.21 mi3.10 mi12951-1123419-743419-7413182(Top 50%)3537(Top 31%)3537(Top 434%)
15K9.32 mi3.11 mi13140-1893545-1263545-12613509(Top 51%)3782(Top 33%)3782(Top 464%)
20K12.43 mi3.11 mi13194-543606-613606-6113370(Top 50%)3742(Top 33%)3742(Top 459%)
Half13.11 mi0.68 mi13190+43602+43602+413349(Top 50%)3698(Top 32%)3698(Top 454%)
25K15.53 mi2.42 mi13179+113600+23600+213312(Top 50%)3810(Top 33%)3810(Top 467%)
30K18.64 mi3.11 mi12875+3043478+1223478+12211739(Top 44%)3040(Top 27%)3040(Top 373%)
20M20.00 mi1.36 mi12736+1393419+593419+5911678(Top 44%)3108(Top 27%)3108(Top 381%)
21M21.00 mi1.00 mi12843-1073500-813500-8114560(Top 55%)4790(Top 42%)4790(Top 588%)
35K21.75 mi0.75 mi12798+453485+153485+1511985(Top 45%)3421(Top 30%)3421(Top 420%)
23M23.00 mi1.25 mi12648+1503420+653420+6510643(Top 40%)2846(Top 25%)2846(Top 349%)
24M24.00 mi1.00 mi12743-953496-763496-7614570(Top 55%)4992(Top 44%)4992(Top 613%)
40K24.85 mi0.85 mi12663+803470+263470+2610804(Top 41%)3052(Top 27%)3052(Top 374%)
25.2M25.20 mi0.35 mi12620+433457+133457+139681(Top 36%)2564(Top 22%)2564(Top 315%)
Finish26.22 mi1.02 mi12607+133467-103467-1012672(Top 48%)4048(Top 35%)4048(Top 497%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

13509

Females

3782

F55-59

3782

5K→10K

3.1 - 6.2 mi

Top 50%
×5stories
+79ft-138ft

Overall

13182

Females

3537

F55-59

3537

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

13509

Females

3782

F55-59

3782

15K→20K

9.3 - 12.4 mi

Top 50%
×5stories
+106ft-86ft

Overall

13370

Females

3742

F55-59

3742

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

13349

Females

3698

F55-59

3698

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

13312

Females

3810

F55-59

3810

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

11739

Females

3040

F55-59

3040

30K→20M

18.6 - 20.0 mi

Top 44%
×5stories
+64ft-50ft

Overall

11678

Females

3108

F55-59

3108

20M→21M

20.0 - 21.0 mi

Top 55%
×8stories
+106ft-24ft

Overall

14560

Females

4790

F55-59

4790

21M→35K

21.0 - 21.8 mi

Top 45%
×7stories
+17ft-86ft

Overall

11985

Females

3421

F55-59

3421

35K→23M

21.8 - 23.0 mi

Top 40%
×5stories
+23ft-63ft

Overall

10643

Females

2846

F55-59

2846

23M→24M

23.0 - 24.0 mi

Top 55%
×6stories
+12ft-82ft

Overall

14570

Females

4992

F55-59

4992

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

10804

Females

3052

F55-59

3052

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9681

Females

2564

F55-59

2564

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

12672

Females

4048

F55-59

4048

Passing Analysis

Category:
Athletes Passed
1856
Passed By
1624
Net Change
+232
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12839
5K → 10K260372-112#12839#12951
10K → 15K135324-189#12951#13140
15K → 20K165219-54#13140#13194
20K → Half3632+4#13194#13190
Half → 25K149138+11#13190#13179
25K → 30K36258+304#13179#12875
30K → 20M17536+139#12875#12736
20M → 21M59166-107#12736#12843
21M → 35K7732+45#12843#12798
35K → 23M16616+150#12798#12648
23M → 24M41136-95#12648#12743
24M → 40K10323+80#12743#12663
40K → 25.2M5512+43#12663#12620
25.2M → Finish7360+13#12620#12607
TOTALS18561624+232
📊

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