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BOSTON MARATHON 2023

Jim Mccaffrey

Bib: 12371•M

CT

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
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
7:55/mi
24:35
↑ 97↓ 3451.5%
10K· 6.21 mi
7:41/mi
48:26
↑ 79↓ 1380.4%
15K· 9.32 mi
7:49/mi
1:12:44
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:39:09
↑ 106↓ 860.1%
Half· 13.11 mi
8:21/mi
1:44:51
↑ 19↓ 370.5%
25K· 15.53 mi
9:42/mi
2:08:23
↑ 66↓ 880.2%
30K· 18.64 mi
10:24/mi
2:40:42
↑ 181↓ 1480.2%
20M
10:59/mi
2:55:38
↑ 64↓ 500.2%
21M
11:22/mi
3:07:00
↑ 106↓ 241.6%
35K· 21.75 mi
10:22/mi
3:14:45
↑ 17↓ 861.7%
23M
11:06/mi
3:28:39
↑ 23↓ 630.6%
24M
11:13/mi
3:39:52
↓ 821.3%
40K· 24.85 mi
11:51/mi
3:50:00
↓ 200.3%
25.2M
11:50/mi
3:54:05
↑ 13↓ 160.2%
Finish· 26.22 mi
10:49/mi
4:05:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:51
Pace8:00 /mi
2nd Half
Distance13.11 mi
Time2:20:15
Pace10:42 /mi
📊Positive Split: 33.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:5624:357:5524:35
7:55
-
10K
6.21 mi11:15:4748:267:4823:51
7:41
-0:14
15K
9.32 mi11:40:051:12:447:4824:18
7:49
+0:08
20K
12.43 mi12:06:301:39:097:5926:25
8:30
+0:41
Half
13.11 mi12:12:121:44:518:005:42
8:21
-0:09
25K
15.53 mi12:35:442:08:238:1623:32
9:42
+1:21
30K
18.64 mi13:08:032:40:428:3732:19
10:24
+0:42
20M
20.00 mi13:22:592:55:388:4714:56
10:59
+0:35
21M
21.00 mi13:34:213:07:008:5411:22
11:22
+0:23
35K
21.75 mi13:42:063:14:458:577:45
10:22
-1:00
23M
23.00 mi13:56:003:28:399:0413:54
11:06
+0:44
24M
24.00 mi14:07:133:39:529:1011:13
11:13
+0:07
40K
24.85 mi14:17:213:50:009:1510:08
11:51
+0:38
25.2M
25.20 mi14:21:263:54:059:174:05
11:50
-0:01
Finish
26.22 mi14:32:274:05:069:2111:01
10:49
-1:01

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

7:41 /mi

Average Pace

9:21 /mi

Slowest Pace

11:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:51

43% of race

Time at Steady Pace

1:43:27

42% of race

Time at Slower Pace

36:48

15% of race

Average Pace: 9:21 /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 mi10:51:5624:357:5524:35
7:55
#13347
10K
6.21 mi11:15:4748:267:4823:51
7:41
#12646
15K
9.32 mi11:40:051:12:447:4824:18
7:49
#12711
20K
12.43 mi12:06:301:39:097:5926:25
8:30
#13922
Half
13.11 mi12:12:121:44:518:005:42
8:21
#14104
25K
15.53 mi12:35:442:08:238:1623:32
9:42
#15774
30K
18.64 mi13:08:032:40:428:3732:19
10:24
#17492
20M
20.00 mi13:22:592:55:388:4714:56
10:59
#18214
21M
21.00 mi13:34:213:07:008:5411:22
11:22
#18579
35K
21.75 mi13:42:063:14:458:577:45
10:22
#18781
23M
23.00 mi13:56:003:28:399:0413:54
11:06
#19177
24M
24.00 mi14:07:133:39:529:1011:13
11:13
#19510
40K
24.85 mi14:17:213:50:009:1510:08
11:51
#19789
25.2M
25.20 mi14:21:263:54:059:174:05
11:50
#19855
Finish
26.22 mi14:32:274:05:069:2111:01
10:49
#20044
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi133479694969412901(Top 48%)9476(Top 62%)9476(Top 421%)
10K6.21 mi3.10 mi12646+7019400+2949400+29412028(Top 45%)9125(Top 60%)9125(Top 405%)
15K9.32 mi3.11 mi12711-659407-79407-712901(Top 48%)9476(Top 62%)9476(Top 421%)
20K12.43 mi3.11 mi13922-12119868-4619868-46116870(Top 63%)10995(Top 72%)10995(Top 488%)
Half13.11 mi0.68 mi14104-1829940-729940-7216831(Top 63%)11032(Top 73%)11032(Top 490%)
25K15.53 mi2.42 mi15774-167010560-62010560-62021465(Top 81%)12902(Top 85%)12902(Top 573%)
30K18.64 mi3.11 mi17492-171811221-66111221-66122002(Top 83%)13069(Top 86%)13069(Top 580%)
20M20.00 mi1.36 mi18214-72211485-26411485-26422681(Top 85%)13310(Top 88%)13310(Top 591%)
21M21.00 mi1.00 mi18579-36511641-15611641-15621617(Top 81%)12802(Top 84%)12802(Top 568%)
35K21.75 mi0.75 mi18781-20211718-7711718-7722107(Top 83%)12967(Top 85%)12967(Top 576%)
23M23.00 mi1.25 mi19177-39611874-15611874-15622528(Top 85%)13162(Top 87%)13162(Top 584%)
24M24.00 mi1.00 mi19510-33312002-12812002-12823421(Top 88%)13540(Top 89%)13540(Top 601%)
40K24.85 mi0.85 mi19789-27912107-10512107-10523690(Top 89%)13630(Top 90%)13630(Top 605%)
25.2M25.20 mi0.35 mi19855-6612134-2712134-2722194(Top 83%)12935(Top 85%)12935(Top 574%)
Finish26.22 mi1.02 mi20044-18912200-6612200-6623617(Top 89%)13628(Top 90%)13628(Top 605%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21story building
+97ft-345ft

Overall

12901

Males

9476

M45-49

9476

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

12028

Males

9125

M45-49

9125

10K→15K

6.2 - 9.3 mi

Top 48%
×3story building
+67ft-78ft

Overall

12901

Males

9476

M45-49

9476

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

16870

Males

10995

M45-49

10995

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

16831

Males

11032

M45-49

11032

Half→25K

13.1 - 15.5 mi

Top 81%
×4story building
+66ft-88ft

Overall

21465

Males

12902

M45-49

12902

25K→30K

15.5 - 18.6 mi

Top 83%
×9story building
+181ft-148ft

Overall

22002

Males

13069

M45-49

13069

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

22681

Males

13310

M45-49

13310

20M→21M

20.0 - 21.0 mi

Top 81%
×8story building
+106ft-24ft

Overall

21617

Males

12802

M45-49

12802

21M→35K

21.0 - 21.8 mi

Top 83%
×7story building
+17ft-86ft

Overall

22107

Males

12967

M45-49

12967

35K→23M

21.8 - 23.0 mi

Top 85%
×5story building
+23ft-63ft

Overall

22528

Males

13162

M45-49

13162

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

23421

Males

13540

M45-49

13540

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

23690

Males

13630

M45-49

13630

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

22194

Males

12935

M45-49

12935

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

23617

Males

13628

M45-49

13628

Passing Analysis

Category:
Athletes Passed
1117
Passed By
7814
Net Change
-6697
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13347
5K → 10K803102+701#13347#12646
10K → 15K180245-65#12646#12711
15K → 20K241235-1211#12711#13922
20K → Half4186-182#13922#14104
Half → 25K81678-1670#14104#15774
25K → 30K161734-1718#15774#17492
30K → 20M8730-722#17492#18214
20M → 21M16381-365#18214#18579
21M → 35K13215-202#18579#18781
35K → 23M10406-396#18781#19177
23M → 24M15348-333#19177#19510
24M → 40K4283-279#19510#19789
40K → 25.2M975-66#19789#19855
25.2M → Finish7196-189#19855#20044
TOTALS11177814-6697
📊

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