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BOSTON MARATHON 2023

Brent Duncan

TX

Bib: 10947 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 31%
Gender (Male)
#0 / 15176
Top 45%
Masters (Masters Men)
#0 / 9891
Top 33%
Division (M45-49)
#0 / 2252
Top 45%
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:17/mi
22:38
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:21/mi
45:27
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:25/mi
1:08:28
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:25/mi
1:31:32
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:20/mi
1:36:32
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:32/mi
1:54:48
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:44/mi
2:18:49
↑ 181↓ 1480.2%
138 ft elev
20M
7:49/mi
2:29:27
↑ 64↓ 500.2%
148 ft elev
21M
8:24/mi
2:37:51
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:21/mi
2:43:21
↑ 17↓ 861.7%
156 ft elev
23M
7:34/mi
2:52:49
↑ 23↓ 630.6%
116 ft elev
24M
7:12/mi
3:00:01
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:29/mi
3:06:25
↓ 200.3%
20 ft elev
25.2M
8:16/mi
3:09:16
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:27/mi
3:16:52
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:36:327:22 /mi⚡ faster
2nd Half
1:40:207:39 /mi+3.9%
Positive split — 3.9% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:5022:387:1722:38
7:17
-
10K
6.21 mi11:11:3945:277:1922:49
7:21
+0:04
15K
9.32 mi11:34:401:08:287:2123:01
7:25
+0:04
20K
12.43 mi11:57:441:31:327:2223:04
7:25
0:00
Half
13.11 mi12:02:441:36:327:225:00
7:20
-0:05
25K
15.53 mi12:21:001:54:487:2318:16
7:32
+0:12
30K
18.64 mi12:45:012:18:497:2724:01
7:44
+0:12
20M
20.00 mi12:55:392:29:277:2810:38
7:49
+0:05
21M
21.00 mi13:04:032:37:517:318:24
8:24
+0:35
35K
21.75 mi13:09:332:43:217:315:30
7:21
-1:03
23M
23.00 mi13:19:012:52:497:319:28
7:34
+0:13
24M
24.00 mi13:26:133:00:017:307:12
7:12
-0:22
40K
24.85 mi13:32:373:06:257:306:24
7:29
+0:17
25.2M
25.20 mi13:35:283:09:167:312:51
8:16
+0:47
Finish
26.22 mi13:43:043:16:527:317:36
7:27
-0:49

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

7:12 /mi

Average Pace

7:31 /mi

Slowest Pace

8:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

3:05:37

94% of race

Time at Steady Pace

11:15

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:30 /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 mi10:48:5022:387:1722:38
7:17
#8017
10K
6.21 mi11:11:3945:277:1922:49
7:21
#8538
15K
9.32 mi11:34:401:08:287:2123:01
7:25
#8804
20K
12.43 mi11:57:441:31:327:2223:04
7:25
#8737
Half
13.11 mi12:02:441:36:327:225:00
7:20
#8732
25K
15.53 mi12:21:001:54:487:2318:16
7:32
#8760
30K
18.64 mi12:45:012:18:497:2724:01
7:44
#8728
20M
20.00 mi12:55:392:29:277:2810:38
7:49
#8736
21M
21.00 mi13:04:032:37:517:318:24
8:24
#8776
35K
21.75 mi13:09:332:43:217:315:30
7:21
#8715
23M
23.00 mi13:19:012:52:497:319:28
7:34
#8566
24M
24.00 mi13:26:133:00:017:307:12
7:12
#8403
40K
24.85 mi13:32:373:06:257:306:24
7:29
#8303
25.2M
25.20 mi13:35:283:09:167:312:51
8:16
#8295
Finish
26.22 mi13:43:043:16:527:317:36
7:27
#8251
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi801769906990939177957795
10K6.21 mi3.10 mi8538-5217295-3057295-305917276777677
15K9.32 mi3.11 mi8804-2667441-1467441-146939177957795
20K12.43 mi3.11 mi8737+677399+427399+42869473097309
Half13.11 mi0.68 mi8732+57390+97390+9877273637363
25K15.53 mi2.42 mi8760-287391-17391-1900774367436
30K18.64 mi3.11 mi8728+327337+547337+54884971847184
20M20.00 mi1.36 mi8736-87321+167321+16903272077207
21M21.00 mi1.00 mi8776-407332-117332-11981174977497
35K21.75 mi0.75 mi8715+617276+567276+56747361776177
23M23.00 mi1.25 mi8566+1497160+1167160+116680156995699
24M24.00 mi1.00 mi8403+1637038+1227038+122575849514951
40K24.85 mi0.85 mi8303+1006956+826956+82662554135413
25.2M25.20 mi0.35 mi8295+86943+136943+13801761776177
Finish26.22 mi1.02 mi8251+446890+536890+53821362866286

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21story building
+97ft-345ft

Overall

9391

Males

7795

M45-49

7795

5K→10K

3.1 - 6.2 mi

Top 34%
×5story building
+79ft-138ft

Overall

9172

Males

7677

M45-49

7677

10K→15K

6.2 - 9.3 mi

Top 35%
×3story building
+67ft-78ft

Overall

9391

Males

7795

M45-49

7795

15K→20K

9.3 - 12.4 mi

Top 33%
×5story building
+106ft-86ft

Overall

8694

Males

7309

M45-49

7309

20K→Half

12.4 - 13.1 mi

Top 33%
×2story building
+19ft-37ft

Overall

8772

Males

7363

M45-49

7363

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

9007

Males

7436

M45-49

7436

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

8849

Males

7184

M45-49

7184

30K→20M

18.6 - 20.0 mi

Top 34%
×5story building
+64ft-50ft

Overall

9032

Males

7207

M45-49

7207

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

9811

Males

7497

M45-49

7497

21M→35K

21.0 - 21.8 mi

Top 28%
×7story building
+17ft-86ft

Overall

7473

Males

6177

M45-49

6177

35K→23M

21.8 - 23.0 mi

Top 26%
×5story building
+23ft-63ft

Overall

6801

Males

5699

M45-49

5699

23M→24M

23.0 - 24.0 mi

Top 22%
×6story building
+12ft-82ft

Overall

5758

Males

4951

M45-49

4951

24M→40K

24.0 - 24.9 mi

Top 25%
×1story
+6ft-20ft

Overall

6625

Males

5413

M45-49

5413

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8017

Males

6177

M45-49

6177

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8213

Males

6286

M45-49

6286

Passing Analysis

Category:
Athletes Passed
1351
Passed By
1585
Net Change
-234
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8017
5K → 10K65586-521#8017#8538
10K → 15K59325-266#8538#8804
15K → 20K15891+67#8804#8737
20K → Half2419+5#8737#8732
Half → 25K97125-28#8732#8760
25K → 30K181149+32#8760#8728
30K → 20M7381-8#8728#8736
20M → 21M68108-40#8736#8776
21M → 35K7110+61#8776#8715
35K → 23M16314+149#8715#8566
23M → 24M1696+163#8566#8403
24M → 40K1066+100#8403#8303
40K → 25.2M3022+8#8303#8295
25.2M → Finish8743+44#8295#8251
TOTALS13511585-234

Passing Charts

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