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BOSTON MARATHON 2023

Hiroko Iijima

Bib: 21912•F

HI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 43%
Division (F55-59)
#0 / 815
Top 19%
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
8:43/mi
27:04
↑ 97↓ 3451.5%
10K· 6.21 mi
8:25/mi
53:12
↑ 79↓ 1380.4%
15K· 9.32 mi
8:25/mi
1:19:20
↑ 67↓ 78
20K· 12.43 mi
8:37/mi
1:46:06
↑ 106↓ 860.1%
Half· 13.11 mi
8:34/mi
1:51:57
↑ 19↓ 370.5%
25K· 15.53 mi
8:49/mi
2:13:19
↑ 66↓ 880.2%
30K· 18.64 mi
8:59/mi
2:41:14
↑ 181↓ 1480.2%
20M
9:05/mi
2:53:35
↑ 64↓ 500.2%
21M
9:18/mi
3:02:53
↑ 106↓ 241.6%
35K· 21.75 mi
8:37/mi
3:09:20
↑ 17↓ 861.7%
23M
8:47/mi
3:20:20
↑ 23↓ 630.6%
24M
8:27/mi
3:28:47
↓ 821.3%
40K· 24.85 mi
8:35/mi
3:36:07
↓ 200.3%
25.2M
9:28/mi
3:39:23
↑ 13↓ 160.2%
Finish· 26.22 mi
8:26/mi
3:47:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:57
Pace8:32 /mi
2nd Half
Distance13.11 mi
Time1:56:02
Pace8:51 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:1027:048:4327:04
8:43
-
10K
6.21 mi11:46:1853:128:3426:08
8:25
-0:18
15K
9.32 mi12:12:261:19:208:3126:08
8:25
0:00
20K
12.43 mi12:39:121:46:068:3226:46
8:37
+0:12
Half
13.11 mi12:45:031:51:578:325:51
8:34
-0:03
25K
15.53 mi13:06:252:13:198:3521:22
8:49
+0:15
30K
18.64 mi13:34:202:41:148:3927:55
8:59
+0:10
20M
20.00 mi13:46:412:53:358:4112:21
9:05
+0:06
21M
21.00 mi13:55:593:02:538:439:18
9:18
+0:13
35K
21.75 mi14:02:263:09:208:426:27
8:37
-0:41
23M
23.00 mi14:13:263:20:208:4311:00
8:47
+0:10
24M
24.00 mi14:21:533:28:478:428:27
8:27
-0:20
40K
24.85 mi14:29:133:36:078:427:20
8:35
+0:08
25.2M
25.20 mi14:32:293:39:238:423:16
9:28
+0:53
Finish
26.22 mi14:41:053:47:598:428:36
8:26
-1:02

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

8:25 /mi

Average Pace

8:42 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:35:25

94% of race

Time at Steady Pace

12:34

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:42 /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 mi11:20:1027:048:4327:04
8:43
#18958
10K
6.21 mi11:46:1853:128:3426:08
8:25
#18271
15K
9.32 mi12:12:261:19:208:3126:08
8:25
#17921
20K
12.43 mi12:39:121:46:068:3226:46
8:37
#17810
Half
13.11 mi12:45:031:51:578:325:51
8:34
#17824
25K
15.53 mi13:06:252:13:198:3521:22
8:49
#17841
30K
18.64 mi13:34:202:41:148:3927:55
8:59
#17657
20M
20.00 mi13:46:412:53:358:4112:21
9:05
#17602
21M
21.00 mi13:55:593:02:538:439:18
9:18
#17441
35K
21.75 mi14:02:263:09:208:426:27
8:37
#17371
23M
23.00 mi14:13:263:20:208:4311:00
8:47
#17237
24M
24.00 mi14:21:533:28:478:428:27
8:27
#17088
40K
24.85 mi14:29:133:36:078:427:20
8:35
#16964
25.2M
25.20 mi14:32:293:39:238:423:16
9:28
#16943
Finish
26.22 mi14:41:053:47:598:428:36
8:26
#16848
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi189587176717617233(Top 65%)6064(Top 53%)6064(Top 744%)
10K6.21 mi3.10 mi18271+6876677+4996677+49917659(Top 66%)6280(Top 55%)6280(Top 771%)
15K9.32 mi3.11 mi17921+3506475+2026475+20217233(Top 65%)6064(Top 53%)6064(Top 744%)
20K12.43 mi3.11 mi17810+1116411+646411+6417597(Top 66%)6285(Top 55%)6285(Top 771%)
Half13.11 mi0.68 mi17824-146415-46415-418196(Top 68%)6591(Top 58%)6591(Top 809%)
25K15.53 mi2.42 mi17841-176438-236438-2318027(Top 68%)6562(Top 57%)6562(Top 805%)
30K18.64 mi3.11 mi17657+1846351+876351+8717095(Top 64%)6123(Top 54%)6123(Top 751%)
20M20.00 mi1.36 mi17602+556331+206331+2017003(Top 64%)6163(Top 54%)6163(Top 756%)
21M21.00 mi1.00 mi17441+1616255+766255+7615014(Top 56%)5068(Top 44%)5068(Top 622%)
35K21.75 mi0.75 mi17371+706225+306225+3016014(Top 60%)5704(Top 50%)5704(Top 700%)
23M23.00 mi1.25 mi17237+1346162+636162+6314944(Top 56%)5144(Top 45%)5144(Top 631%)
24M24.00 mi1.00 mi17088+1496095+676095+6714223(Top 53%)4809(Top 42%)4809(Top 590%)
40K24.85 mi0.85 mi16964+1246042+536042+5313864(Top 52%)4677(Top 41%)4677(Top 574%)
25.2M25.20 mi0.35 mi16943+216042604215141(Top 57%)5395(Top 47%)5395(Top 662%)
Finish26.22 mi1.02 mi16848+955987+555987+5515048(Top 57%)5283(Top 46%)5283(Top 648%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

17233

Females

6064

F55-59

6064

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

17659

Females

6280

F55-59

6280

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

17233

Females

6064

F55-59

6064

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

17597

Females

6285

F55-59

6285

20K→Half

12.4 - 13.1 mi

Top 68%
×2story building
+19ft-37ft

Overall

18196

Females

6591

F55-59

6591

Half→25K

13.1 - 15.5 mi

Top 68%
×4story building
+66ft-88ft

Overall

18027

Females

6562

F55-59

6562

25K→30K

15.5 - 18.6 mi

Top 64%
×9story building
+181ft-148ft

Overall

17095

Females

6123

F55-59

6123

30K→20M

18.6 - 20.0 mi

Top 64%
×5story building
+64ft-50ft

Overall

17003

Females

6163

F55-59

6163

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

15014

Females

5068

F55-59

5068

21M→35K

21.0 - 21.8 mi

Top 60%
×7story building
+17ft-86ft

Overall

16014

Females

5704

F55-59

5704

35K→23M

21.8 - 23.0 mi

Top 56%
×5story building
+23ft-63ft

Overall

14944

Females

5144

F55-59

5144

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14223

Females

4809

F55-59

4809

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13864

Females

4677

F55-59

4677

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

15141

Females

5395

F55-59

5395

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2story building
+22ft-21ft

Overall

15048

Females

5283

F55-59

5283

Passing Analysis

Category:
Athletes Passed
2862
Passed By
752
Net Change
+2110
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18958
5K → 10K822135+687#18958#18271
10K → 15K41464+350#18271#17921
15K → 20K222111+111#17921#17810
20K → Half2539-14#17810#17824
Half → 25K130147-17#17824#17841
25K → 30K26581+184#17841#17657
30K → 20M10752+55#17657#17602
20M → 21M17918+161#17602#17441
21M → 35K8919+70#17441#17371
35K → 23M15925+134#17371#17237
23M → 24M1567+149#17237#17088
24M → 40K1306+124#17088#16964
40K → 25.2M3918+21#16964#16943
25.2M → Finish12530+95#16943#16848
TOTALS2862752+2110
📊

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