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BOSTON MARATHON 2023

Declan Irwin

Bib: 31337•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 30%
Gender (Male)
#0 / 15176
Top 44%
Masters (Masters Men)
#0 / 9891
Top 31%
Division (M40-44)
#0 / 2241
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
7:18/mi
22:42
↑ 97↓ 3451.5%
10K· 6.21 mi
6:54/mi
44:07
↑ 79↓ 1380.4%
15K· 9.32 mi
7:06/mi
1:06:12
↑ 67↓ 78
20K· 12.43 mi
7:04/mi
1:28:10
↑ 106↓ 860.1%
Half· 13.11 mi
7:02/mi
1:32:58
↑ 19↓ 370.5%
25K· 15.53 mi
7:17/mi
1:50:37
↑ 66↓ 880.2%
30K· 18.64 mi
7:41/mi
2:14:28
↑ 181↓ 1480.2%
20M
8:12/mi
2:25:37
↑ 64↓ 500.2%
21M
8:36/mi
2:34:13
↑ 106↓ 241.6%
35K· 21.75 mi
7:34/mi
2:39:53
↑ 17↓ 861.7%
23M
8:17/mi
2:50:15
↑ 23↓ 630.6%
24M
7:38/mi
2:57:53
↓ 821.3%
40K· 24.85 mi
7:50/mi
3:04:35
↓ 200.3%
25.2M
8:33/mi
3:07:32
↑ 13↓ 160.2%
Finish· 26.22 mi
8:07/mi
3:15:48
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:58
Pace7:05 /mi
2nd Half
Distance13.11 mi
Time1:42:50
Pace7:51 /mi
📊Positive Split: 10.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:40:2122:427:1822:42
7:18
-
10K
6.21 mi12:01:4644:077:0621:25
6:54
-0:24
15K
9.32 mi12:23:511:06:127:0622:05
7:06
+0:12
20K
12.43 mi12:45:491:28:107:0621:58
7:04
-0:02
Half
13.11 mi12:50:371:32:587:054:48
7:02
-0:02
25K
15.53 mi13:08:161:50:377:0717:39
7:17
+0:15
30K
18.64 mi13:32:072:14:287:1323:51
7:41
+0:24
20M
20.00 mi13:43:162:25:377:1711:09
8:12
+0:31
21M
21.00 mi13:51:522:34:137:218:36
8:36
+0:24
35K
21.75 mi13:57:322:39:537:215:40
7:34
-1:02
23M
23.00 mi14:07:542:50:157:2410:22
8:17
+0:43
24M
24.00 mi14:15:322:57:537:257:38
7:38
-0:39
40K
24.85 mi14:22:143:04:357:266:42
7:50
+0:12
25.2M
25.20 mi14:25:113:07:327:272:57
8:33
+0:43
Finish
26.22 mi14:33:273:15:487:288:16
8:07
-0:26

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

6:54 /mi

Average Pace

7:28 /mi

Slowest Pace

8:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:37

56% of race

Time at Steady Pace

43:51

22% of race

Time at Slower Pace

41:20

21% of race

Average Pace: 7:28 /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 mi11:40:2122:427:1822:42
7:18
#8135
10K
6.21 mi12:01:4644:077:0621:25
6:54
#7108
15K
9.32 mi12:23:511:06:127:0622:05
7:06
#7125
20K
12.43 mi12:45:491:28:107:0621:58
7:04
#6899
Half
13.11 mi12:50:371:32:587:054:48
7:02
#6885
25K
15.53 mi13:08:161:50:377:0717:39
7:17
#6899
30K
18.64 mi13:32:072:14:287:1323:51
7:41
#7068
20M
20.00 mi13:43:162:25:377:1711:09
8:12
#7320
21M
21.00 mi13:51:522:34:137:218:36
8:36
#7487
35K
21.75 mi13:57:322:39:537:215:40
7:34
#7509
23M
23.00 mi14:07:542:50:157:2410:22
8:17
#7699
24M
24.00 mi14:15:322:57:537:257:38
7:38
#7714
40K
24.85 mi14:22:143:04:357:266:42
7:50
#7759
25.2M
25.20 mi14:25:113:07:327:272:57
8:33
#7776
Finish
26.22 mi14:33:273:15:487:288:16
8:07
#7950
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi8135706470647197(Top 27%)6383(Top 42%)6383(Top 285%)
10K6.21 mi3.10 mi7108+10276341+7236341+7236080(Top 23%)5527(Top 36%)5527(Top 247%)
15K9.32 mi3.11 mi7125-176348-76348-77197(Top 27%)6383(Top 42%)6383(Top 285%)
20K12.43 mi3.11 mi6899+2266176+1726176+1726397(Top 24%)5768(Top 38%)5768(Top 257%)
Half13.11 mi0.68 mi6885+146165+116165+116767(Top 25%)6074(Top 40%)6074(Top 271%)
25K15.53 mi2.42 mi6899-14616561657162(Top 27%)6264(Top 41%)6264(Top 280%)
30K18.64 mi3.11 mi7068-1696263-986263-988468(Top 32%)6961(Top 46%)6961(Top 311%)
20M20.00 mi1.36 mi7320-2526427-1646427-16411697(Top 44%)8560(Top 56%)8560(Top 382%)
21M21.00 mi1.00 mi7487-1676506-796506-7911024(Top 41%)8118(Top 53%)8118(Top 362%)
35K21.75 mi0.75 mi7509-226510-46510-49041(Top 34%)7084(Top 47%)7084(Top 316%)
23M23.00 mi1.25 mi7699-1906624-1146624-11411701(Top 44%)8319(Top 55%)8319(Top 371%)
24M24.00 mi1.00 mi7714-156604+206604+208595(Top 32%)6662(Top 44%)6662(Top 297%)
40K24.85 mi0.85 mi7759-456619-156619-158879(Top 33%)6741(Top 44%)6741(Top 301%)
25.2M25.20 mi0.35 mi7776-176617+26617+29786(Top 37%)7172(Top 47%)7172(Top 320%)
Finish26.22 mi1.02 mi7950-1746706-896706-8912818(Top 48%)8672(Top 57%)8672(Top 387%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21story building
+97ft-345ft

Overall

7197

Males

6383

M40-44

6383

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6080

Males

5527

M40-44

5527

10K→15K

6.2 - 9.3 mi

Top 27%
×3story building
+67ft-78ft

Overall

7197

Males

6383

M40-44

6383

15K→20K

9.3 - 12.4 mi

Top 24%
×5story building
+106ft-86ft

Overall

6397

Males

5768

M40-44

5768

20K→Half

12.4 - 13.1 mi

Top 25%
×2story building
+19ft-37ft

Overall

6767

Males

6074

M40-44

6074

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7162

Males

6264

M40-44

6264

25K→30K

15.5 - 18.6 mi

Top 32%
×9story building
+181ft-148ft

Overall

8468

Males

6961

M40-44

6961

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

11697

Males

8560

M40-44

8560

20M→21M

20.0 - 21.0 mi

Top 41%
×8story building
+106ft-24ft

Overall

11024

Males

8118

M40-44

8118

21M→35K

21.0 - 21.8 mi

Top 34%
×7story building
+17ft-86ft

Overall

9041

Males

7084

M40-44

7084

35K→23M

21.8 - 23.0 mi

Top 44%
×5story building
+23ft-63ft

Overall

11701

Males

8319

M40-44

8319

23M→24M

23.0 - 24.0 mi

Top 32%
×6story building
+12ft-82ft

Overall

8595

Males

6662

M40-44

6662

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8879

Males

6741

M40-44

6741

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

9786

Males

7172

M40-44

7172

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

12818

Males

8672

M40-44

8672

Passing Analysis

Category:
Athletes Passed
1846
Passed By
1661
Net Change
+185
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8135
5K → 10K103811+1027#8135#7108
10K → 15K134151-17#7108#7125
15K → 20K24620+226#7125#6899
20K → Half2814+14#6899#6885
Half → 25K7488-14#6885#6899
25K → 30K66235-169#6899#7068
30K → 20M14266-252#7068#7320
20M → 21M31198-167#7320#7487
21M → 35K2648-22#7487#7509
35K → 23M38228-190#7509#7699
23M → 24M6277-15#7699#7714
24M → 40K4792-45#7714#7759
40K → 25.2M2138-17#7759#7776
25.2M → Finish21195-174#7776#7950
TOTALS18461661+185
📊

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