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BOSTON MARATHON 2023

Barbara Bilow

Bib: 21053•F

OH

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 46%
Masters (Masters Women)
#0 / 6539
Top 34%
Division (F50-54)
#0 / 1207
Top 26%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:03
Rank: #18932
Start → 5K
27:03 | 8:42/mi
10K· 6.21 mi
53:36
Rank: #18670 (+262)
5K → 10K
26:33 | 8:33/mi
15K· 9.32 mi
1:19:58
Rank: #18360 (+310)
10K → 15K
26:22 | 8:29/mi
20K· 12.43 mi
1:46:21
Rank: #17945 (+415)
15K → 20K
26:23 | 8:30/mi
Half· 13.11 mi
1:52:06
Rank: #17900 (+45)
20K → Half
5:45 | 8:26/mi
25K· 15.53 mi
2:12:41
Rank: #17583 (+317)
Half → 25K
20:35 | 8:29/mi
30K· 18.64 mi
2:39:13
Rank: #17008 (+575)
25K → 30K
26:32 | 8:32/mi
20M
2:50:47
Rank: #16769 (+239)
30K → 20M
11:34 | 8:31/mi
21M
2:59:32
Rank: #16484 (+285)
20M → 21M
8:45 | 8:45/mi
35K· 21.75 mi
3:05:39
Rank: #16360 (+124)
21M → 35K
6:07 | 8:11/mi
23M
3:16:06
Rank: #16119 (+241)
35K → 23M
10:27 | 8:21/mi
24M
3:24:18
Rank: #15963 (+156)
23M → 24M
8:12 | 8:12/mi
40K· 24.85 mi
3:31:22
Rank: #15801 (+162)
24M → 40K
7:04 | 8:16/mi
25.2M
3:34:24
Rank: #15731 (+70)
40K → 25.2M
3:02 | 8:48/mi
Finish· 26.22 mi
3:42:24
Rank: #15545 (+186)
25.2M → Finish
8:00 | 7:51/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:52:06
Pace8:33 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:50:18
Pace8:25 /mi
📊Negative Split: 1.6% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:4227:038:4227:03
8:42
-
10K
6.21 mi11:50:1553:368:3826:33
8:33
-0:09
15K
9.32 mi12:16:371:19:588:3526:22
8:29
-0:04
20K
12.43 mi12:43:001:46:218:3326:23
8:30
+0:01
Half
13.11 mi12:48:451:52:068:335:45
8:26
-0:04
25K
15.53 mi13:09:202:12:418:3220:35
8:29
+0:03
30K
18.64 mi13:35:522:39:138:3226:32
8:32
+0:03
20M
20.00 mi13:47:262:50:478:3211:34
8:31
-0:01
21M
21.00 mi13:56:112:59:328:338:45
8:45
+0:14
35K
21.75 mi14:02:183:05:398:326:07
8:11
-0:34
23M
23.00 mi14:12:453:16:068:3210:27
8:21
+0:10
24M
24.00 mi14:20:573:24:188:318:12
8:12
-0:09
40K
24.85 mi14:28:013:31:228:307:04
8:16
+0:04
25.2M
25.20 mi14:31:033:34:248:303:02
8:48
+0:32
Finish
26.22 mi14:39:033:42:248:298:00
7:51
-0:57

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

7:51 /mi

Average Pace

8:29 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:03:34

83% of race

Time at Steady Pace

38:50

17% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:29 /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 mi11:23:4227:038:4227:03
8:42
#18932
10K
6.21 mi11:50:1553:368:3826:33
8:33
#18670
15K
9.32 mi12:16:371:19:588:3526:22
8:29
#18360
20K
12.43 mi12:43:001:46:218:3326:23
8:30
#17945
Half
13.11 mi12:48:451:52:068:335:45
8:26
#17900
25K
15.53 mi13:09:202:12:418:3220:35
8:29
#17583
30K
18.64 mi13:35:522:39:138:3226:32
8:32
#17008
20M
20.00 mi13:47:262:50:478:3211:34
8:31
#16769
21M
21.00 mi13:56:112:59:328:338:45
8:45
#16484
35K
21.75 mi14:02:183:05:398:326:07
8:11
#16360
23M
23.00 mi14:12:453:16:068:3210:27
8:21
#16119
24M
24.00 mi14:20:573:24:188:318:12
8:12
#15963
40K
24.85 mi14:28:013:31:228:307:04
8:16
#15801
25.2M
25.20 mi14:31:033:34:248:303:02
8:48
#15731
Finish
26.22 mi14:39:033:42:248:298:00
7:51
#15545
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi189327159715917716(Top 67%)6342(Top 56%)6342(Top 525%)
10K6.21 mi3.10 mi18670+2626924+2356924+23518529(Top 70%)6782(Top 59%)6782(Top 562%)
15K9.32 mi3.11 mi18360+3106723+2016723+20117716(Top 67%)6342(Top 56%)6342(Top 525%)
20K12.43 mi3.11 mi17945+4156489+2346489+23416799(Top 63%)5817(Top 51%)5817(Top 482%)
Half13.11 mi0.68 mi17900+456461+286461+2817308(Top 65%)6054(Top 53%)6054(Top 502%)
25K15.53 mi2.42 mi17583+3176285+1766285+17616136(Top 61%)5520(Top 48%)5520(Top 457%)
30K18.64 mi3.11 mi17008+5755965+3205965+32014563(Top 55%)4667(Top 41%)4667(Top 387%)
20M20.00 mi1.36 mi16769+2395847+1185847+11813734(Top 52%)4267(Top 37%)4267(Top 354%)
21M21.00 mi1.00 mi16484+2855701+1465701+14612016(Top 45%)3418(Top 30%)3418(Top 283%)
35K21.75 mi0.75 mi16360+1245637+645637+6413332(Top 50%)4194(Top 37%)4194(Top 347%)
23M23.00 mi1.25 mi16119+2415520+1175520+11712264(Top 46%)3675(Top 32%)3675(Top 304%)
24M24.00 mi1.00 mi15963+1565453+675453+6712657(Top 48%)3957(Top 35%)3957(Top 328%)
40K24.85 mi0.85 mi15801+1625364+895364+8911850(Top 45%)3597(Top 31%)3597(Top 298%)
25.2M25.20 mi0.35 mi15731+705322+425322+4211442(Top 43%)3454(Top 30%)3454(Top 286%)
Finish26.22 mi1.02 mi15545+1865233+895233+8911088(Top 42%)3253(Top 28%)3253(Top 270%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21stories
+97ft-345ft

Overall

17716

Females

6342

F50-54

6342

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

18529

Females

6782

F50-54

6782

10K→15K

6.2 - 9.3 mi

Top 67%
×3stories
+67ft-78ft

Overall

17716

Females

6342

F50-54

6342

15K→20K

9.3 - 12.4 mi

Top 63%
×5stories
+106ft-86ft

Overall

16799

Females

5817

F50-54

5817

20K→Half

12.4 - 13.1 mi

Top 65%
×2stories
+19ft-37ft

Overall

17308

Females

6054

F50-54

6054

Half→25K

13.1 - 15.5 mi

Top 61%
×4stories
+66ft-88ft

Overall

16136

Females

5520

F50-54

5520

25K→30K

15.5 - 18.6 mi

Top 55%
×9stories
+181ft-148ft

Overall

14563

Females

4667

F50-54

4667

30K→20M

18.6 - 20.0 mi

Top 52%
×5stories
+64ft-50ft

Overall

13734

Females

4267

F50-54

4267

20M→21M

20.0 - 21.0 mi

Top 45%
×8stories
+106ft-24ft

Overall

12016

Females

3418

F50-54

3418

21M→35K

21.0 - 21.8 mi

Top 50%
×7stories
+17ft-86ft

Overall

13332

Females

4194

F50-54

4194

35K→23M

21.8 - 23.0 mi

Top 46%
×5stories
+23ft-63ft

Overall

12264

Females

3675

F50-54

3675

23M→24M

23.0 - 24.0 mi

Top 48%
×6stories
+12ft-82ft

Overall

12657

Females

3957

F50-54

3957

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

11850

Females

3597

F50-54

3597

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11442

Females

3454

F50-54

3454

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2stories
+22ft-21ft

Overall

11088

Females

3253

F50-54

3253

Passing Analysis

Category:
Athletes Passed
3787
Passed By
400
Net Change
+3387
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18932
5K → 10K512250+262#18932#18670
10K → 15K37363+310#18670#18360
15K → 20K43823+415#18360#17945
20K → Half6520+45#17945#17900
Half → 25K3258+317#17900#17583
25K → 30K5805+575#17583#17008
30K → 20M2412+239#17008#16769
20M → 21M2850+285#16769#16484
21M → 35K1317+124#16484#16360
35K → 23M2498+241#16360#16119
23M → 24M1626+156#16119#15963
24M → 40K1664+162#15963#15801
40K → 25.2M733+70#15801#15731
25.2M → Finish1871+186#15731#15545
TOTALS3787400+3387
📊

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