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BOSTON MARATHON 2023

Julie Mackenzie

Bib: 13408•F

ON

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0:00
/ mi
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Overall
#0 / 26622
Top 48%
Gender (Female)
#0 / 11423
Top 32%
Division (F18-39)
#0 / 4884
Top 50%
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
7:39/mi
23:45
↑ 97↓ 3451.5%
10K· 6.21 mi
7:29/mi
47:01
↑ 79↓ 1380.4%
15K· 9.32 mi
7:35/mi
1:10:36
↑ 67↓ 78
20K· 12.43 mi
7:50/mi
1:34:57
↑ 106↓ 860.1%
Half· 13.11 mi
7:43/mi
1:40:13
↑ 19↓ 370.5%
25K· 15.53 mi
8:02/mi
1:59:42
↑ 66↓ 880.2%
30K· 18.64 mi
8:30/mi
2:26:06
↑ 181↓ 1480.2%
20M
8:47/mi
2:38:02
↑ 64↓ 500.2%
21M
9:45/mi
2:47:47
↑ 106↓ 241.6%
35K· 21.75 mi
8:44/mi
2:54:19
↑ 17↓ 861.7%
23M
8:33/mi
3:05:01
↑ 23↓ 630.6%
24M
8:24/mi
3:13:25
↓ 821.3%
40K· 24.85 mi
8:40/mi
3:20:50
↓ 200.3%
25.2M
9:34/mi
3:24:08
↑ 13↓ 160.2%
Finish· 26.22 mi
7:58/mi
3:32:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:13
Pace7:39 /mi
2nd Half
Distance13.11 mi
Time1:52:02
Pace8:33 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:2123:457:3923:45
7:39
-
10K
6.21 mi11:15:3747:017:3423:16
7:29
-0:10
15K
9.32 mi11:39:121:10:367:3423:35
7:35
+0:06
20K
12.43 mi12:03:331:34:577:3824:21
7:50
+0:15
Half
13.11 mi12:08:491:40:137:395:16
7:43
-0:07
25K
15.53 mi12:28:181:59:427:4219:29
8:02
+0:19
30K
18.64 mi12:54:422:26:067:5026:24
8:30
+0:28
20M
20.00 mi13:06:382:38:027:5411:56
8:47
+0:17
21M
21.00 mi13:16:232:47:477:599:45
9:45
+0:58
35K
21.75 mi13:22:552:54:198:016:32
8:44
-1:01
23M
23.00 mi13:33:373:05:018:0310:42
8:33
-0:11
24M
24.00 mi13:42:013:13:258:048:24
8:24
-0:09
40K
24.85 mi13:49:263:20:508:057:25
8:40
+0:16
25.2M
25.20 mi13:52:443:24:088:063:18
9:34
+0:54
Finish
26.22 mi14:00:513:32:158:068:07
7:58
-1:36

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

7:29 /mi

Average Pace

8:06 /mi

Slowest Pace

9:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:49

60% of race

Time at Steady Pace

59:27

28% of race

Time at Slower Pace

24:59

12% of race

Average Pace: 8:06 /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 mi10:52:2123:457:3923:45
7:39
#10997
10K
6.21 mi11:15:3747:017:3423:16
7:29
#10627
15K
9.32 mi11:39:121:10:367:3423:35
7:35
#10720
20K
12.43 mi12:03:331:34:577:3824:21
7:50
#11037
Half
13.11 mi12:08:491:40:137:395:16
7:43
#11083
25K
15.53 mi12:28:181:59:427:4219:29
8:02
#11351
30K
18.64 mi12:54:422:26:067:5026:24
8:30
#11915
20M
20.00 mi13:06:382:38:027:5411:56
8:47
#12237
21M
21.00 mi13:16:232:47:477:599:45
9:45
#12582
35K
21.75 mi13:22:552:54:198:016:32
8:44
#12742
23M
23.00 mi13:33:373:05:018:0310:42
8:33
#12802
24M
24.00 mi13:42:013:13:258:048:24
8:24
#12837
40K
24.85 mi13:49:263:20:508:057:25
8:40
#12874
25.2M
25.20 mi13:52:443:24:088:063:18
9:34
#12924
Finish
26.22 mi14:00:513:32:158:068:07
7:58
#12871
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi109972331233110963(Top 41%)2327(Top 20%)2327(Top 48%)
10K6.21 mi3.10 mi10627+3702137+1942137+19410381(Top 39%)1997(Top 17%)1997(Top 41%)
15K9.32 mi3.11 mi10720-932183-462183-4610963(Top 41%)2327(Top 20%)2327(Top 48%)
20K12.43 mi3.11 mi11037-3172350-1672350-16712075(Top 45%)3018(Top 26%)3018(Top 62%)
Half13.11 mi0.68 mi11083-462376-262376-2612153(Top 46%)3028(Top 27%)3028(Top 62%)
25K15.53 mi2.42 mi11351-2682565-1892565-18913062(Top 49%)3669(Top 32%)3669(Top 75%)
30K18.64 mi3.11 mi11915-5642935-3702935-37014316(Top 54%)4520(Top 40%)4520(Top 93%)
20M20.00 mi1.36 mi12237-3223122-1873122-18715356(Top 58%)5204(Top 46%)5204(Top 107%)
21M21.00 mi1.00 mi12582-3453346-2243346-22417087(Top 64%)6249(Top 55%)6249(Top 128%)
35K21.75 mi0.75 mi12742-1603455-1093455-10916651(Top 63%)6090(Top 53%)6090(Top 125%)
23M23.00 mi1.25 mi12802-603511-563511-5613543(Top 51%)4372(Top 38%)4372(Top 90%)
24M24.00 mi1.00 mi12837-353553-423553-4213933(Top 52%)4645(Top 41%)4645(Top 95%)
40K24.85 mi0.85 mi12874-373598-453598-4514426(Top 54%)4995(Top 44%)4995(Top 102%)
25.2M25.20 mi0.35 mi12924-503637-393637-3915631(Top 59%)5689(Top 50%)5689(Top 116%)
Finish26.22 mi1.02 mi12871+533626+113626+1111932(Top 45%)3688(Top 32%)3688(Top 76%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

10963

Females

2327

F18-39

2327

5K→10K

3.1 - 6.2 mi

Top 39%
×5story building
+79ft-138ft

Overall

10381

Females

1997

F18-39

1997

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

10963

Females

2327

F18-39

2327

15K→20K

9.3 - 12.4 mi

Top 45%
×5story building
+106ft-86ft

Overall

12075

Females

3018

F18-39

3018

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

12153

Females

3028

F18-39

3028

Half→25K

13.1 - 15.5 mi

Top 49%
×4story building
+66ft-88ft

Overall

13062

Females

3669

F18-39

3669

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

14316

Females

4520

F18-39

4520

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

15356

Females

5204

F18-39

5204

20M→21M

20.0 - 21.0 mi

Top 64%
×8story building
+106ft-24ft

Overall

17087

Females

6249

F18-39

6249

21M→35K

21.0 - 21.8 mi

Top 63%
×7story building
+17ft-86ft

Overall

16651

Females

6090

F18-39

6090

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

13543

Females

4372

F18-39

4372

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

13933

Females

4645

F18-39

4645

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14426

Females

4995

F18-39

4995

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15631

Females

5689

F18-39

5689

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

11932

Females

3688

F18-39

3688

Passing Analysis

Category:
Athletes Passed
1237*
Passed By
3111
Net Change
-1874
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10997
5K → 10K510*140+370#10997#10627
10K → 15K150243-93#10627#10720
15K → 20K76393-317#10720#11037
20K → Half1561-46#11037#11083
Half → 25K55323-268#11083#11351
25K → 30K63627-564#11351#11915
30K → 20M40362-322#11915#12237
20M → 21M28373-345#12237#12582
21M → 35K17177-160#12582#12742
35K → 23M60120-60#12742#12802
23M → 24M6196-35#12802#12837
24M → 40K5895-37#12837#12874
40K → 25.2M1262-50#12874#12924
25.2M → Finish9239+53#12924#12871
TOTALS1237*3111-1874

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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