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BOSTON MARATHON 2023

Julie Demarco

Bib: 21485•F

PA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
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
8:37/mi
26:46
↑ 97↓ 3451.5%
10K· 6.21 mi
8:30/mi
53:11
↑ 79↓ 1380.4%
15K· 9.32 mi
8:32/mi
1:19:42
↑ 67↓ 78
20K· 12.43 mi
8:36/mi
1:46:24
↑ 106↓ 860.1%
Half· 13.11 mi
8:32/mi
1:52:13
↑ 19↓ 370.5%
25K· 15.53 mi
8:34/mi
2:13:00
↑ 66↓ 880.2%
30K· 18.64 mi
8:48/mi
2:40:20
↑ 181↓ 1480.2%
20M
9:05/mi
2:52:40
↑ 64↓ 500.2%
21M
10:12/mi
3:02:52
↑ 106↓ 241.6%
35K· 21.75 mi
8:49/mi
3:09:28
↑ 17↓ 861.7%
23M
9:20/mi
3:21:09
↑ 23↓ 630.6%
24M
15:21/mi
3:36:30
↓ 821.3%
40K· 24.85 mi
9:03/mi
3:44:14
↓ 200.3%
25.2M
9:14/mi
3:47:25
↑ 13↓ 160.2%
Finish· 26.22 mi
8:25/mi
3:56:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:13
Pace8:34 /mi
2nd Half
Distance13.11 mi
Time2:03:47
Pace9:27 /mi
📊Positive Split: 10.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:2426:468:3726:46
8:37
-
10K
6.21 mi11:48:4953:118:3426:25
8:30
-0:07
15K
9.32 mi12:15:201:19:428:3326:31
8:32
+0:02
20K
12.43 mi12:42:021:46:248:3426:42
8:36
+0:04
Half
13.11 mi12:47:511:52:138:345:49
8:32
-0:04
25K
15.53 mi13:08:382:13:008:3420:47
8:34
+0:02
30K
18.64 mi13:35:582:40:208:3627:20
8:48
+0:14
20M
20.00 mi13:48:182:52:408:3812:20
9:05
+0:17
21M
21.00 mi13:58:303:02:528:4210:12
10:12
+1:07
35K
21.75 mi14:05:063:09:288:436:36
8:49
-1:23
23M
23.00 mi14:16:473:21:098:4511:41
9:20
+0:31
24M
24.00 mi14:32:083:36:309:0115:21
15:21
+6:01
40K
24.85 mi14:39:523:44:149:017:44
9:03
-6:18
25.2M
25.20 mi14:43:033:47:259:013:11
9:14
+0:11
Finish
26.22 mi14:51:383:56:009:008:35
8:25
-0:49

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

9:00 /mi

Slowest Pace

15:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:30:27

89% of race

Time at Slower Pace

25:33

11% of race

Average Pace: 9:00 /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 mi11:22:2426:468:3726:46
8:37
#18326
10K
6.21 mi11:48:4953:118:3426:25
8:30
#18258
15K
9.32 mi12:15:201:19:428:3326:31
8:32
#18184
20K
12.43 mi12:42:021:46:248:3426:42
8:36
#17973
Half
13.11 mi12:47:511:52:138:345:49
8:32
#17967
25K
15.53 mi13:08:382:13:008:3420:47
8:34
#17697
30K
18.64 mi13:35:582:40:208:3627:20
8:48
#17362
20M
20.00 mi13:48:182:52:408:3812:20
9:05
#17327
21M
21.00 mi13:58:303:02:528:4210:12
10:12
#17437
35K
21.75 mi14:05:063:09:288:436:36
8:49
#17419
23M
23.00 mi14:16:473:21:098:4511:41
9:20
#17443
24M
24.00 mi14:32:083:36:309:0115:21
15:21
#18855
40K
24.85 mi14:39:523:44:149:017:44
9:03
#18766
25.2M
25.20 mi14:43:033:47:259:013:11
9:14
#18701
Finish
26.22 mi14:51:383:56:009:008:35
8:25
#18557
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi183266762676218057(Top 68%)6537(Top 57%)6537(Top 360%)
10K6.21 mi3.10 mi18258+686675+876675+8718280(Top 69%)6647(Top 58%)6647(Top 366%)
15K9.32 mi3.11 mi18184+746633+426633+4218057(Top 68%)6537(Top 57%)6537(Top 360%)
20K12.43 mi3.11 mi17973+2116505+1286505+12817464(Top 66%)6205(Top 54%)6205(Top 341%)
Half13.11 mi0.68 mi17967+66496+96496+917910(Top 67%)6439(Top 56%)6439(Top 354%)
25K15.53 mi2.42 mi17697+2706351+1456351+14516659(Top 63%)5815(Top 51%)5815(Top 320%)
30K18.64 mi3.11 mi17362+3356169+1826169+18216065(Top 60%)5544(Top 49%)5544(Top 305%)
20M20.00 mi1.36 mi17327+356175-66175-616963(Top 64%)6143(Top 54%)6143(Top 338%)
21M21.00 mi1.00 mi17437-1106254-796254-7918727(Top 70%)7182(Top 63%)7182(Top 395%)
35K21.75 mi0.75 mi17419+186257-36257-317107(Top 64%)6345(Top 56%)6345(Top 349%)
23M23.00 mi1.25 mi17443-246289-326289-3217679(Top 66%)6677(Top 58%)6677(Top 367%)
24M24.00 mi1.00 mi18855-14127119-8307119-83026455(Top 99%)11353(Top 99%)11353(Top 625%)
40K24.85 mi0.85 mi18766+897079+407079+4016430(Top 62%)6103(Top 53%)6103(Top 336%)
25.2M25.20 mi0.35 mi18701+657048+317048+3113946(Top 52%)4757(Top 42%)4757(Top 262%)
Finish26.22 mi1.02 mi18557+1446970+786970+7814927(Top 56%)5228(Top 46%)5228(Top 288%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21story building
+97ft-345ft

Overall

18057

Females

6537

F45-49

6537

5K→10K

3.1 - 6.2 mi

Top 69%
×5story building
+79ft-138ft

Overall

18280

Females

6647

F45-49

6647

10K→15K

6.2 - 9.3 mi

Top 68%
×3story building
+67ft-78ft

Overall

18057

Females

6537

F45-49

6537

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

17464

Females

6205

F45-49

6205

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

17910

Females

6439

F45-49

6439

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

16659

Females

5815

F45-49

5815

25K→30K

15.5 - 18.6 mi

Top 60%
×9story building
+181ft-148ft

Overall

16065

Females

5544

F45-49

5544

30K→20M

18.6 - 20.0 mi

Top 64%
×5story building
+64ft-50ft

Overall

16963

Females

6143

F45-49

6143

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

18727

Females

7182

F45-49

7182

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

17107

Females

6345

F45-49

6345

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

17679

Females

6677

F45-49

6677

23M→24M

23.0 - 24.0 mi

Top 99%
×6story building
+12ft-82ft

Overall

26455

Females

11353

F45-49

11353

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

16430

Females

6103

F45-49

6103

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

13946

Females

4757

F45-49

4757

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

14927

Females

5228

F45-49

5228

Passing Analysis

Category:
Athletes Passed
2159
Passed By
2390
Net Change
-231
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18326
5K → 10K347279+68#18326#18258
10K → 15K219145+74#18258#18184
15K → 20K28574+211#18184#17973
20K → Half3630+6#17973#17967
Half → 25K28717+270#17967#17697
25K → 30K36227+335#17697#17362
30K → 20M11075+35#17362#17327
20M → 21M46156-110#17327#17437
21M → 35K6143+18#17437#17419
35K → 23M84108-24#17419#17443
23M → 24M11413-1412#17443#18855
24M → 40K10112+89#18855#18766
40K → 25.2M672+65#18766#18701
25.2M → Finish1539+144#18701#18557
TOTALS21592390-231
📊

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