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BOSTON MARATHON 2023

Nathalie Juchau

Bib: 21430•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 42%
Division (F50-54)
#0 / 1207
Top 34%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:19
Rank: #17374
Start → 5K
8:28/mi
26:19 split
10K· 6.21 mi
51:54
Rank: #16884 (+490)
5K → 10K
8:14/mi
25:35 split
15K· 9.32 mi
1:17:36
Rank: #16703 (+181)
10K → 15K
8:16/mi
25:42 split
20K· 12.43 mi
1:43:26
Rank: #16450 (+253)
15K → 20K
8:19/mi
25:50 split
Half· 13.11 mi
1:49:03
Rank: #16424 (+26)
20K → Half
8:14/mi
5:37 split
25K· 15.53 mi
2:09:23
Rank: #16251 (+173)
Half → 25K
8:23/mi
20:20 split
30K· 18.64 mi
2:36:57
Rank: #16290 (-39)
25K → 30K
8:52/mi
27:34 split
20M
2:49:02
Rank: #16235 (+55)
30K → 20M
8:54/mi
12:05 split
21M
2:59:00
Rank: #16339 (-104)
20M → 21M
9:58/mi
9:58 split
35K· 21.75 mi
3:05:35
Rank: #16347 (-8)
21M → 35K
8:48/mi
6:35 split
23M
3:17:38
Rank: #16546 (-199)
35K → 23M
9:37/mi
12:03 split
24M
3:26:53
Rank: #16624 (-78)
23M → 24M
9:15/mi
9:15 split
40K· 24.85 mi
3:34:55
Rank: #16698 (-74)
24M → 40K
9:24/mi
8:02 split
25.2M
3:38:21
Rank: #16692 (+6)
40K → 25.2M
9:57/mi
3:26 split
Finish· 26.22 mi
3:47:13
Rank: #16680 (+12)
25.2M → Finish
8:42/mi
8:52 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:03
Pace8:19 /mi
2nd Half
Distance13.11 mi
Time1:58:10
Pace9:01 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:2126:198:2826:19
8:28
-
10K
6.21 mi11:44:5651:548:2125:35
8:14
-0:14
15K
9.32 mi12:10:381:17:368:2025:42
8:16
+0:02
20K
12.43 mi12:36:281:43:268:1925:50
8:19
+0:03
Half
13.11 mi12:42:051:49:038:195:37
8:14
-0:05
25K
15.53 mi13:02:252:09:238:2020:20
8:23
+0:09
30K
18.64 mi13:29:592:36:578:2527:34
8:52
+0:29
20M
20.00 mi13:42:042:49:028:2712:05
8:54
+0:02
21M
21.00 mi13:52:022:59:008:319:58
9:58
+1:04
35K
21.75 mi13:58:373:05:358:326:35
8:48
-1:10
23M
23.00 mi14:10:403:17:388:3612:03
9:37
+0:49
24M
24.00 mi14:19:553:26:538:379:15
9:15
-0:22
40K
24.85 mi14:27:573:34:558:398:02
9:24
+0:09
25.2M
25.20 mi14:31:233:38:218:403:26
9:57
+0:33
Finish
26.22 mi14:40:153:47:138:408:52
8:42
-1:15

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

8:14 /mi

Average Pace

8:40 /mi

Slowest Pace

9:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:23

57% of race

Time at Steady Pace

55:06

24% of race

Time at Slower Pace

42:44

19% of race

Average Pace: 8:40 /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 mi11:19:2126:198:2826:19
8:28
#17374
10K
6.21 mi11:44:5651:548:2125:35
8:14
#16884
15K
9.32 mi12:10:381:17:368:2025:42
8:16
#16703
20K
12.43 mi12:36:281:43:268:1925:50
8:19
#16450
Half
13.11 mi12:42:051:49:038:195:37
8:14
#16424
25K
15.53 mi13:02:252:09:238:2020:20
8:23
#16251
30K
18.64 mi13:29:592:36:578:2527:34
8:52
#16290
20M
20.00 mi13:42:042:49:028:2712:05
8:54
#16235
21M
21.00 mi13:52:022:59:008:319:58
9:58
#16339
35K
21.75 mi13:58:373:05:358:326:35
8:48
#16347
23M
23.00 mi14:10:403:17:388:3612:03
9:37
#16546
24M
24.00 mi14:19:553:26:538:379:15
9:15
#16624
40K
24.85 mi14:27:573:34:558:398:02
9:24
#16698
25.2M
25.20 mi14:31:233:38:218:403:26
9:57
#16692
Finish
26.22 mi14:40:153:47:138:408:52
8:42
#16680
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi173746179617916367(Top 61%)5515(Top 48%)5515(Top 457%)
10K6.21 mi3.10 mi16884+4905835+3445835+34416505(Top 62%)5580(Top 49%)5580(Top 462%)
15K9.32 mi3.11 mi16703+1815733+1025733+10216367(Top 61%)5515(Top 48%)5515(Top 457%)
20K12.43 mi3.11 mi16450+2535575+1585575+15815709(Top 59%)5171(Top 45%)5171(Top 428%)
Half13.11 mi0.68 mi16424+265570+55570+516099(Top 60%)5367(Top 47%)5367(Top 445%)
25K15.53 mi2.42 mi16251+1735485+855485+8515515(Top 58%)5153(Top 45%)5153(Top 427%)
30K18.64 mi3.11 mi16290-395563-785563-7816510(Top 62%)5796(Top 51%)5796(Top 480%)
20M20.00 mi1.36 mi16235+555539+245539+2415988(Top 60%)5570(Top 49%)5570(Top 461%)
21M21.00 mi1.00 mi16339-1045619-805619-8017917(Top 67%)6706(Top 59%)6706(Top 556%)
35K21.75 mi0.75 mi16347-85630-115630-1116954(Top 64%)6248(Top 55%)6248(Top 518%)
23M23.00 mi1.25 mi16546-1995754-1245754-12418830(Top 71%)7304(Top 64%)7304(Top 605%)
24M24.00 mi1.00 mi16624-785822-685822-6818268(Top 69%)7036(Top 62%)7036(Top 583%)
40K24.85 mi0.85 mi16698-745880-585880-5817939(Top 67%)6911(Top 61%)6911(Top 573%)
25.2M25.20 mi0.35 mi16692+65885-55885-517226(Top 65%)6552(Top 57%)6552(Top 543%)
Finish26.22 mi1.02 mi16680+125887-25887-216517(Top 62%)6108(Top 53%)6108(Top 506%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21stories
+97ft-345ft

Overall

16367

Females

5515

F50-54

5515

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

16505

Females

5580

F50-54

5580

10K→15K

6.2 - 9.3 mi

Top 61%
×3stories
+67ft-78ft

Overall

16367

Females

5515

F50-54

5515

15K→20K

9.3 - 12.4 mi

Top 59%
×5stories
+106ft-86ft

Overall

15709

Females

5171

F50-54

5171

20K→Half

12.4 - 13.1 mi

Top 60%
×2stories
+19ft-37ft

Overall

16099

Females

5367

F50-54

5367

Half→25K

13.1 - 15.5 mi

Top 58%
×4stories
+66ft-88ft

Overall

15515

Females

5153

F50-54

5153

25K→30K

15.5 - 18.6 mi

Top 62%
×9stories
+181ft-148ft

Overall

16510

Females

5796

F50-54

5796

30K→20M

18.6 - 20.0 mi

Top 60%
×5stories
+64ft-50ft

Overall

15988

Females

5570

F50-54

5570

20M→21M

20.0 - 21.0 mi

Top 67%
×8stories
+106ft-24ft

Overall

17917

Females

6706

F50-54

6706

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

16954

Females

6248

F50-54

6248

35K→23M

21.8 - 23.0 mi

Top 71%
×5stories
+23ft-63ft

Overall

18830

Females

7304

F50-54

7304

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

18268

Females

7036

F50-54

7036

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

17939

Females

6911

F50-54

6911

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

17226

Females

6552

F50-54

6552

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

16517

Females

6108

F50-54

6108

Passing Analysis

Category:
Athletes Passed
2103
Passed By
1409
Net Change
+694
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17374
5K → 10K635145+490#17374#16884
10K → 15K304123+181#16884#16703
15K → 20K30653+253#16703#16450
20K → Half4822+26#16450#16424
Half → 25K23057+173#16424#16251
25K → 30K168207-39#16251#16290
30K → 20M10752+55#16290#16235
20M → 21M47151-104#16235#16339
21M → 35K4755-8#16339#16347
35K → 23M32231-199#16347#16546
23M → 24M45123-78#16546#16624
24M → 40K33107-74#16624#16698
40K → 25.2M2923+6#16698#16692
25.2M → Finish7260+12#16692#16680
TOTALS21031409+694
📊

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