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BOSTON MARATHON 2023

Julie Blair

Bib: 20206•F

OH

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 43%
Masters (Masters Women)
#0 / 6539
Top 31%
Division (F45-49)
#0 / 1817
Top 36%
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
8:13/mi
25:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:10/mi
50:54
↑ 79↓ 1380.4%
15K· 9.32 mi
8:29/mi
1:17:14
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:42:57
↑ 106↓ 860.1%
Half· 13.11 mi
8:12/mi
1:48:33
↑ 19↓ 370.5%
25K· 15.53 mi
8:17/mi
2:08:39
↑ 66↓ 880.2%
30K· 18.64 mi
8:33/mi
2:35:14
↑ 181↓ 1480.2%
20M
8:33/mi
2:46:51
↑ 64↓ 500.2%
21M
9:17/mi
2:56:08
↑ 106↓ 241.6%
35K· 21.75 mi
8:28/mi
3:02:28
↑ 17↓ 861.7%
23M
8:39/mi
3:13:18
↑ 23↓ 630.6%
24M
8:26/mi
3:21:44
↓ 821.3%
40K· 24.85 mi
8:31/mi
3:29:01
↓ 200.3%
25.2M
9:11/mi
3:32:11
↑ 13↓ 160.2%
Finish· 26.22 mi
8:20/mi
3:40:41
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:33
Pace8:17 /mi
2nd Half
Distance13.11 mi
Time1:52:08
Pace8:33 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4925:318:1325:31
8:13
-
10K
6.21 mi11:44:1250:548:1125:23
8:10
-0:03
15K
9.32 mi12:10:321:17:148:1726:20
8:29
+0:19
20K
12.43 mi12:36:151:42:578:1725:43
8:17
-0:12
Half
13.11 mi12:41:511:48:338:175:36
8:12
-0:05
25K
15.53 mi13:01:572:08:398:1720:06
8:17
+0:05
30K
18.64 mi13:28:322:35:148:2026:35
8:33
+0:16
20M
20.00 mi13:40:092:46:518:2111:37
8:33
0:00
21M
21.00 mi13:49:262:56:088:239:17
9:17
+0:44
35K
21.75 mi13:55:463:02:288:236:20
8:28
-0:49
23M
23.00 mi14:06:363:13:188:2410:50
8:39
+0:11
24M
24.00 mi14:15:023:21:448:248:26
8:26
-0:13
40K
24.85 mi14:22:193:29:018:257:17
8:31
+0:05
25.2M
25.20 mi14:25:293:32:118:253:10
9:11
+0:40
Finish
26.22 mi14:33:593:40:418:258:30
8:20
-0:51

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

8:10 /mi

Average Pace

8:25 /mi

Slowest Pace

9:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:28:14

94% of race

Time at Steady Pace

12:27

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:25 /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 mi11:18:4925:318:1325:31
8:13
#15571
10K
6.21 mi11:44:1250:548:1125:23
8:10
#15763
15K
9.32 mi12:10:321:17:148:1726:20
8:29
#16427
20K
12.43 mi12:36:151:42:578:1725:43
8:17
#16145
Half
13.11 mi12:41:511:48:338:175:36
8:12
#16130
25K
15.53 mi13:01:572:08:398:1720:06
8:17
#15915
30K
18.64 mi13:28:322:35:148:2026:35
8:33
#15662
20M
20.00 mi13:40:092:46:518:2111:37
8:33
#15512
21M
21.00 mi13:49:262:56:088:239:17
9:17
#15439
35K
21.75 mi13:55:463:02:288:236:20
8:28
#15423
23M
23.00 mi14:06:363:13:188:2410:50
8:39
#15318
24M
24.00 mi14:15:023:21:448:248:26
8:26
#15243
40K
24.85 mi14:22:193:29:018:257:17
8:31
#15176
25.2M
25.20 mi14:25:293:32:118:253:10
9:11
#15123
Finish
26.22 mi14:33:593:40:418:258:30
8:20
#15106
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi155715016501617636(Top 66%)6291(Top 55%)6291(Top 346%)
10K6.21 mi3.10 mi15763-1925135-1195135-11916047(Top 60%)5301(Top 46%)5301(Top 292%)
15K9.32 mi3.11 mi16427-6645542-4075542-40717636(Top 66%)6291(Top 55%)6291(Top 346%)
20K12.43 mi3.11 mi16145+2825393+1495393+14915475(Top 58%)5014(Top 44%)5014(Top 276%)
Half13.11 mi0.68 mi16130+155391+25391+215888(Top 60%)5220(Top 46%)5220(Top 287%)
25K15.53 mi2.42 mi15915+2155281+1105281+11014901(Top 56%)4768(Top 42%)4768(Top 262%)
30K18.64 mi3.11 mi15662+2535162+1195162+11914663(Top 55%)4730(Top 41%)4730(Top 260%)
20M20.00 mi1.36 mi15512+1505098+645098+6413953(Top 52%)4387(Top 38%)4387(Top 241%)
21M21.00 mi1.00 mi15439+735082+165082+1614916(Top 56%)5005(Top 44%)5005(Top 275%)
35K21.75 mi0.75 mi15423+165085-35085-315138(Top 57%)5189(Top 45%)5189(Top 286%)
23M23.00 mi1.25 mi15318+1055043+425043+4214108(Top 53%)4683(Top 41%)4683(Top 258%)
24M24.00 mi1.00 mi15243+755004+395004+3914107(Top 53%)4734(Top 41%)4734(Top 261%)
40K24.85 mi0.85 mi15176+674979+254979+2513504(Top 51%)4481(Top 39%)4481(Top 247%)
25.2M25.20 mi0.35 mi15123+534961+184961+1813618(Top 51%)4555(Top 40%)4555(Top 251%)
Finish26.22 mi1.02 mi15106+174969-84969-814376(Top 54%)4938(Top 43%)4938(Top 272%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21story building
+97ft-345ft

Overall

17636

Females

6291

F45-49

6291

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

16047

Females

5301

F45-49

5301

10K→15K

6.2 - 9.3 mi

Top 66%
×3story building
+67ft-78ft

Overall

17636

Females

6291

F45-49

6291

15K→20K

9.3 - 12.4 mi

Top 58%
×5story building
+106ft-86ft

Overall

15475

Females

5014

F45-49

5014

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

15888

Females

5220

F45-49

5220

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

14901

Females

4768

F45-49

4768

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

14663

Females

4730

F45-49

4730

30K→20M

18.6 - 20.0 mi

Top 52%
×5story building
+64ft-50ft

Overall

13953

Females

4387

F45-49

4387

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

14916

Females

5005

F45-49

5005

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

15138

Females

5189

F45-49

5189

35K→23M

21.8 - 23.0 mi

Top 53%
×5story building
+23ft-63ft

Overall

14108

Females

4683

F45-49

4683

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14107

Females

4734

F45-49

4734

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

13504

Females

4481

F45-49

4481

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

13618

Females

4555

F45-49

4555

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

14376

Females

4938

F45-49

4938

Passing Analysis

Category:
Athletes Passed
2015
Passed By
1550
Net Change
+465
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15571
5K → 10K216408-192#15571#15763
10K → 15K47711-664#15763#16427
15K → 20K33149+282#16427#16145
20K → Half4934+15#16145#16130
Half → 25K25136+215#16130#15915
25K → 30K30956+253#15915#15662
30K → 20M16919+150#15662#15512
20M → 21M12350+73#15512#15439
21M → 35K5135+16#15439#15423
35K → 23M13934+105#15423#15318
23M → 24M10631+75#15318#15243
24M → 40K9225+67#15243#15176
40K → 25.2M629+53#15176#15123
25.2M → Finish7053+17#15123#15106
TOTALS20151550+465
📊

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