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BOSTON MARATHON 2023

Thomas Kirk

Bib: 31758•M

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
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
8:25/mi
26:09
↑ 97↓ 3451.5%
10K· 6.21 mi
8:21/mi
52:07
↑ 79↓ 1380.4%
15K· 9.32 mi
8:30/mi
1:18:31
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:44:56
↑ 106↓ 860.1%
Half· 13.11 mi
8:27/mi
1:50:42
↑ 19↓ 370.5%
25K· 15.53 mi
8:45/mi
2:11:56
↑ 66↓ 880.2%
30K· 18.64 mi
9:09/mi
2:40:22
↑ 181↓ 1480.2%
20M
9:25/mi
2:53:10
↑ 64↓ 500.2%
21M
10:33/mi
3:03:43
↑ 106↓ 241.6%
35K· 21.75 mi
9:27/mi
3:10:47
↑ 17↓ 861.7%
23M
9:58/mi
3:23:16
↑ 23↓ 630.6%
24M
9:51/mi
3:33:07
↓ 821.3%
40K· 24.85 mi
10:26/mi
3:42:02
↓ 200.3%
25.2M
12:17/mi
3:46:16
↑ 13↓ 160.2%
Finish· 26.22 mi
9:49/mi
3:56:16
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:42
Pace8:27 /mi
2nd Half
Distance13.11 mi
Time2:05:34
Pace9:35 /mi
📊Positive Split: 13.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:1226:098:2526:09
8:25
-
10K
6.21 mi12:09:1052:078:2325:58
8:21
-0:04
15K
9.32 mi12:35:341:18:318:2526:24
8:30
+0:09
20K
12.43 mi13:01:591:44:568:2726:25
8:30
0:00
Half
13.11 mi13:07:451:50:428:275:46
8:27
-0:03
25K
15.53 mi13:28:592:11:568:3021:14
8:45
+0:18
30K
18.64 mi13:57:252:40:228:3628:26
9:09
+0:24
20M
20.00 mi14:10:132:53:108:3912:48
9:25
+0:16
21M
21.00 mi14:20:463:03:438:4510:33
10:33
+1:08
35K
21.75 mi14:27:503:10:478:467:04
9:27
-1:06
23M
23.00 mi14:40:193:23:168:5012:29
9:58
+0:31
24M
24.00 mi14:50:103:33:078:539:51
9:51
-0:07
40K
24.85 mi14:59:053:42:028:568:55
10:26
+0:35
25.2M
25.20 mi15:03:193:46:168:594:14
12:17
+1:51
Finish
26.22 mi15:13:193:56:169:0110:00
9:49
-2:28

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

8:21 /mi

Average Pace

9:01 /mi

Slowest Pace

12:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:56

56% of race

Time at Steady Pace

1:08:09

29% of race

Time at Slower Pace

36:11

15% of race

Average Pace: 9:01 /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 mi11:43:1226:098:2526:09
8:25
#17002
10K
6.21 mi12:09:1052:078:2325:58
8:21
#17124
15K
9.32 mi12:35:341:18:318:2526:24
8:30
#17350
20K
12.43 mi13:01:591:44:568:2726:25
8:30
#17216
Half
13.11 mi13:07:451:50:428:275:46
8:27
#17218
25K
15.53 mi13:28:592:11:568:3021:14
8:45
#17281
30K
18.64 mi13:57:252:40:228:3628:26
9:09
#17370
20M
20.00 mi14:10:132:53:108:3912:48
9:25
#17469
21M
21.00 mi14:20:463:03:438:4510:33
10:33
#17687
35K
21.75 mi14:27:503:10:478:467:04
9:27
#17764
23M
23.00 mi14:40:193:23:168:5012:29
9:58
#17998
24M
24.00 mi14:50:103:33:078:539:51
9:51
#18148
40K
24.85 mi14:59:053:42:028:568:55
10:26
#18324
25.2M
25.20 mi15:03:193:46:168:594:14
12:17
#18456
Finish
26.22 mi15:13:193:56:169:0110:00
9:49
#18612
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi17002110571105717787(Top 67%)11384(Top 75%)11384(Top 215%)
10K6.21 mi3.10 mi17124-12211103-4611103-4617285(Top 65%)11215(Top 74%)11215(Top 212%)
15K9.32 mi3.11 mi17350-22611204-10111204-10117787(Top 67%)11384(Top 75%)11384(Top 215%)
20K12.43 mi3.11 mi17216+13411139+6511139+6516868(Top 63%)10993(Top 72%)10993(Top 208%)
Half13.11 mi0.68 mi17218-211142-311142-317441(Top 66%)11275(Top 74%)11275(Top 213%)
25K15.53 mi2.42 mi17281-6311155-1311155-1317699(Top 66%)11278(Top 74%)11278(Top 213%)
30K18.64 mi3.11 mi17370-8911178-2311178-2317935(Top 67%)11304(Top 74%)11304(Top 214%)
20M20.00 mi1.36 mi17469-9911192-1411192-1418527(Top 70%)11462(Top 76%)11462(Top 217%)
21M21.00 mi1.00 mi17687-21811264-7211264-7219728(Top 74%)11924(Top 79%)11924(Top 226%)
35K21.75 mi0.75 mi17764-7711280-1611280-1619678(Top 74%)11908(Top 78%)11908(Top 225%)
23M23.00 mi1.25 mi17998-23411369-8911369-8919896(Top 75%)11972(Top 79%)11972(Top 227%)
24M24.00 mi1.00 mi18148-15011416-4711416-4720360(Top 76%)12149(Top 80%)12149(Top 230%)
40K24.85 mi0.85 mi18324-17611475-5911475-5921031(Top 79%)12383(Top 82%)12383(Top 234%)
25.2M25.20 mi0.35 mi18456-13211534-5911534-5922914(Top 86%)13272(Top 87%)13272(Top 251%)
Finish26.22 mi1.02 mi18612-15611594-6011594-6021179(Top 80%)12502(Top 82%)12502(Top 237%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

17787

Males

11384

M18-39

11384

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

17285

Males

11215

M18-39

11215

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

17787

Males

11384

M18-39

11384

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

16868

Males

10993

M18-39

10993

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

17441

Males

11275

M18-39

11275

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

17699

Males

11278

M18-39

11278

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

17935

Males

11304

M18-39

11304

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

18527

Males

11462

M18-39

11462

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

19728

Males

11924

M18-39

11924

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

19678

Males

11908

M18-39

11908

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

19896

Males

11972

M18-39

11972

23M→24M

23.0 - 24.0 mi

Top 76%
×6story building
+12ft-82ft

Overall

20360

Males

12149

M18-39

12149

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

21031

Males

12383

M18-39

12383

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

22914

Males

13272

M18-39

13272

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2story building
+22ft-21ft

Overall

21179

Males

12502

M18-39

12502

Passing Analysis

Category:
Athletes Passed
1087
Passed By
2697
Net Change
-1610
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17002
5K → 10K257379-122#17002#17124
10K → 15K114340-226#17124#17350
15K → 20K235101+134#17350#17216
20K → Half2830-2#17216#17218
Half → 25K103166-63#17218#17281
25K → 30K132221-89#17281#17370
30K → 20M59158-99#17370#17469
20M → 21M35253-218#17469#17687
21M → 35K34111-77#17687#17764
35K → 23M32266-234#17764#17998
23M → 24M22172-150#17998#18148
24M → 40K14190-176#18148#18324
40K → 25.2M5137-132#18324#18456
25.2M → Finish17173-156#18456#18612
TOTALS10872697-1610
📊

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