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BOSTON MARATHON 2023

Karen Nelson

Bib: 23289•F

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 45%
Division (F55-59)
#0 / 815
Top 21%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:58/mi
27:52
↑ 97↓ 3451.5%
10K· 6.21 mi
9:01/mi
55:52
↑ 79↓ 1380.4%
15K· 9.32 mi
8:46/mi
1:23:06
↑ 67↓ 78
20K· 12.43 mi
8:49/mi
1:50:30
↑ 106↓ 860.1%
Half· 13.11 mi
8:36/mi
1:56:22
↑ 19↓ 370.5%
25K· 15.53 mi
8:38/mi
2:17:17
↑ 66↓ 880.2%
30K· 18.64 mi
9:01/mi
2:45:17
↑ 181↓ 1480.2%
20M
8:46/mi
2:57:12
↑ 64↓ 500.2%
21M
9:16/mi
3:06:28
↑ 106↓ 241.6%
35K· 21.75 mi
8:25/mi
3:12:46
↑ 17↓ 861.7%
23M
8:13/mi
3:23:03
↑ 23↓ 630.6%
24M
8:01/mi
3:31:04
↓ 821.3%
40K· 24.85 mi
8:09/mi
3:38:02
↓ 200.3%
25.2M
8:45/mi
3:41:03
↑ 13↓ 160.2%
Finish· 26.22 mi
7:47/mi
3:48:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:56:22
Pace8:53 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:52:37
Pace8:35 /mi
📊Negative Split: 3.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:0527:528:5827:52
8:58
-
10K
6.21 mi11:53:0555:528:5928:00
9:01
+0:03
15K
9.32 mi12:20:191:23:068:5527:14
8:46
-0:15
20K
12.43 mi12:47:431:50:308:5327:24
8:49
+0:03
Half
13.11 mi12:53:351:56:228:535:52
8:36
-0:13
25K
15.53 mi13:14:302:17:178:5020:55
8:38
+0:02
30K
18.64 mi13:42:302:45:178:5228:00
9:01
+0:23
20M
20.00 mi13:54:252:57:128:5211:55
8:46
-0:15
21M
21.00 mi14:03:413:06:288:539:16
9:16
+0:30
35K
21.75 mi14:09:593:12:468:526:18
8:25
-0:51
23M
23.00 mi14:20:163:23:038:5010:17
8:13
-0:12
24M
24.00 mi14:28:173:31:048:488:01
8:01
-0:12
40K
24.85 mi14:35:153:38:028:466:58
8:09
+0:08
25.2M
25.20 mi14:38:163:41:038:463:01
8:45
+0:36
Finish
26.22 mi14:46:123:48:598:447:56
7:47
-0:58

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

7:47 /mi

Average Pace

8:44 /mi

Slowest Pace

9:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

39:30

17% of race

Time at Steady Pace

3:00:13

79% of race

Time at Slower Pace

9:16

4% of race

Average Pace: 8:44 /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 mi11:25:0527:528:5827:52
8:58
#20311
10K
6.21 mi11:53:0555:528:5928:00
9:01
#20613
15K
9.32 mi12:20:191:23:068:5527:14
8:46
#20191
20K
12.43 mi12:47:431:50:308:5327:24
8:49
#19820
Half
13.11 mi12:53:351:56:228:535:52
8:36
#19741
25K
15.53 mi13:14:302:17:178:5020:55
8:38
#19293
30K
18.64 mi13:42:302:45:178:5228:00
9:01
#18929
20M
20.00 mi13:54:252:57:128:5211:55
8:46
#18674
21M
21.00 mi14:03:413:06:288:539:16
9:16
#18421
35K
21.75 mi14:09:593:12:468:526:18
8:25
#18294
23M
23.00 mi14:20:163:23:038:5010:17
8:13
#17937
24M
24.00 mi14:28:173:31:048:488:01
8:01
#17677
40K
24.85 mi14:35:153:38:028:466:58
8:09
#17437
25.2M
25.20 mi14:38:163:41:038:463:01
8:45
#17327
Finish
26.22 mi14:46:123:48:598:447:56
7:47
#17105
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi203118001800119332(Top 73%)7285(Top 64%)7285(Top 894%)
10K6.21 mi3.10 mi20613-3028093-928093-9220930(Top 79%)8217(Top 72%)8217(Top 1008%)
15K9.32 mi3.11 mi20191+4227838+2557838+25519332(Top 73%)7285(Top 64%)7285(Top 894%)
20K12.43 mi3.11 mi19820+3717613+2257613+22518790(Top 71%)6959(Top 61%)6959(Top 854%)
Half13.11 mi0.68 mi19741+797557+567557+5618335(Top 69%)6670(Top 58%)6670(Top 818%)
25K15.53 mi2.42 mi19293+4487299+2587299+25816977(Top 64%)5995(Top 52%)5995(Top 736%)
30K18.64 mi3.11 mi18929+3647097+2027097+20217247(Top 65%)6211(Top 54%)6211(Top 762%)
20M20.00 mi1.36 mi18674+2556968+1296968+12915284(Top 57%)5164(Top 45%)5164(Top 634%)
21M21.00 mi1.00 mi18421+2536840+1286840+12814853(Top 56%)4972(Top 44%)4972(Top 610%)
35K21.75 mi0.75 mi18294+1276774+666774+6614907(Top 56%)5062(Top 44%)5062(Top 621%)
23M23.00 mi1.25 mi17937+3576579+1956579+19511321(Top 43%)3182(Top 28%)3182(Top 390%)
24M24.00 mi1.00 mi17677+2606441+1386441+13811413(Top 43%)3308(Top 29%)3308(Top 406%)
40K24.85 mi0.85 mi17437+2406305+1366305+13611083(Top 42%)3208(Top 28%)3208(Top 394%)
25.2M25.20 mi0.35 mi17327+1106250+556250+5511154(Top 42%)3312(Top 29%)3312(Top 406%)
Finish26.22 mi1.02 mi17105+2226132+1186132+11810625(Top 40%)3017(Top 26%)3017(Top 370%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21story building
+97ft-345ft

Overall

19332

Females

7285

F55-59

7285

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

20930

Females

8217

F55-59

8217

10K→15K

6.2 - 9.3 mi

Top 73%
×3story building
+67ft-78ft

Overall

19332

Females

7285

F55-59

7285

15K→20K

9.3 - 12.4 mi

Top 71%
×5story building
+106ft-86ft

Overall

18790

Females

6959

F55-59

6959

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

18335

Females

6670

F55-59

6670

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

16977

Females

5995

F55-59

5995

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

17247

Females

6211

F55-59

6211

30K→20M

18.6 - 20.0 mi

Top 57%
×5story building
+64ft-50ft

Overall

15284

Females

5164

F55-59

5164

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

14853

Females

4972

F55-59

4972

21M→35K

21.0 - 21.8 mi

Top 56%
×7story building
+17ft-86ft

Overall

14907

Females

5062

F55-59

5062

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

11321

Females

3182

F55-59

3182

23M→24M

23.0 - 24.0 mi

Top 43%
×6story building
+12ft-82ft

Overall

11413

Females

3308

F55-59

3308

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

11083

Females

3208

F55-59

3208

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11154

Females

3312

F55-59

3312

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

10625

Females

3017

F55-59

3017

Passing Analysis

Category:
Athletes Passed
3806
Passed By
600
Net Change
+3206
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20311
5K → 10K161463-302#20311#20613
10K → 15K46038+422#20613#20191
15K → 20K40433+371#20191#19820
20K → Half856+79#19820#19741
Half → 25K4513+448#19741#19293
25K → 30K39632+364#19293#18929
30K → 20M2605+255#18929#18674
20M → 21M2607+253#18674#18421
21M → 35K1281+127#18421#18294
35K → 23M3581+357#18294#17937
23M → 24M2600+260#17937#17677
24M → 40K2422+240#17677#17437
40K → 25.2M1111+110#17437#17327
25.2M → Finish2308+222#17327#17105
TOTALS3806600+3206
📊

Passing Visuals

Category:
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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