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BOSTON MARATHON 2023

Jason Guernsey

Bib: 5176•M

WI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 26%
Gender (Male)
#0 / 15176
Top 40%
Masters (Masters Men)
#0 / 9891
Top 27%
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:57
Rank: #4078
Start → 5K
20:57 | 6:45/mi
10K· 6.21 mi
43:06
Rank: #6097 (-2019)
5K → 10K
22:09 | 7:08/mi
15K· 9.32 mi
1:05:26
Rank: #6629 (-532)
10K → 15K
22:20 | 7:11/mi
20K· 12.43 mi
1:28:17
Rank: #6962 (-333)
15K → 20K
22:51 | 7:21/mi
Half· 13.11 mi
1:33:07
Rank: #6956 (+6)
20K → Half
4:50 | 7:05/mi
25K· 15.53 mi
1:51:22
Rank: #7185 (-229)
Half → 25K
18:15 | 7:32/mi
30K· 18.64 mi
2:14:46
Rank: #7153 (+32)
25K → 30K
23:24 | 7:32/mi
20M
2:25:12
Rank: #7181 (-28)
30K → 20M
10:26 | 7:41/mi
21M
2:33:08
Rank: #7127 (+54)
20M → 21M
7:56 | 7:56/mi
35K· 21.75 mi
2:38:27
Rank: #7074 (+53)
21M → 35K
5:19 | 7:06/mi
23M
2:48:12
Rank: #7087 (-13)
35K → 23M
9:45 | 7:47/mi
24M
2:55:43
Rank: #7095 (-8)
23M → 24M
7:31 | 7:31/mi
40K· 24.85 mi
3:02:18
Rank: #7098 (-3)
24M → 40K
6:35 | 7:42/mi
25.2M
3:05:06
Rank: #7070 (+28)
40K → 25.2M
2:48 | 8:07/mi
Finish· 26.22 mi
3:12:40
Rank: #7051 (+19)
25.2M → Finish
7:34 | 7:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:07
Pace7:06 /mi
2nd Half
Distance13.11 mi
Time1:39:33
Pace7:36 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2220:576:4520:57
6:45
-
10K
6.21 mi10:45:3143:066:5622:09
7:08
+0:23
15K
9.32 mi11:07:511:05:267:0122:20
7:11
+0:03
20K
12.43 mi11:30:421:28:177:0622:51
7:21
+0:10
Half
13.11 mi11:35:321:33:077:064:50
7:05
-0:16
25K
15.53 mi11:53:471:51:227:1018:15
7:32
+0:27
30K
18.64 mi12:17:112:14:467:1423:24
7:32
0:00
20M
20.00 mi12:27:372:25:127:1610:26
7:41
+0:09
21M
21.00 mi12:35:332:33:087:187:56
7:56
+0:15
35K
21.75 mi12:40:522:38:277:175:19
7:06
-0:50
23M
23.00 mi12:50:372:48:127:199:45
7:47
+0:41
24M
24.00 mi12:58:082:55:437:197:31
7:31
-0:16
40K
24.85 mi13:04:433:02:187:206:35
7:42
+0:11
25.2M
25.20 mi13:07:313:05:067:212:48
8:07
+0:25
Finish
26.22 mi13:15:053:12:407:217:34
7:26
-0:41

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

6:45 /mi

Average Pace

7:21 /mi

Slowest Pace

8:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:15:35

39% of race

Time at Steady Pace

1:30:01

47% of race

Time at Slower Pace

27:04

14% of race

Average Pace: 7:21 /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 mi10:23:2220:576:4520:57
6:45
#4078
10K
6.21 mi10:45:3143:066:5622:09
7:08
#6097
15K
9.32 mi11:07:511:05:267:0122:20
7:11
#6629
20K
12.43 mi11:30:421:28:177:0622:51
7:21
#6962
Half
13.11 mi11:35:321:33:077:064:50
7:05
#6956
25K
15.53 mi11:53:471:51:227:1018:15
7:32
#7185
30K
18.64 mi12:17:112:14:467:1423:24
7:32
#7153
20M
20.00 mi12:27:372:25:127:1610:26
7:41
#7181
21M
21.00 mi12:35:332:33:087:187:56
7:56
#7127
35K
21.75 mi12:40:522:38:277:175:19
7:06
#7074
23M
23.00 mi12:50:372:48:127:199:45
7:47
#7087
24M
24.00 mi12:58:082:55:437:197:31
7:31
#7095
40K
24.85 mi13:04:433:02:187:206:35
7:42
#7098
25.2M
25.20 mi13:07:313:05:067:212:48
8:07
#7070
Finish
26.22 mi13:15:053:12:407:217:34
7:26
#7051
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4078382538257714(Top 29%)6726(Top 44%)6726(Top 300%)
10K6.21 mi3.10 mi6097-20195559-17345559-17347609(Top 29%)6680(Top 44%)6680(Top 298%)
15K9.32 mi3.11 mi6629-5325975-4165975-4167714(Top 29%)6726(Top 44%)6726(Top 300%)
20K12.43 mi3.11 mi6962-3336222-2476222-2478163(Top 31%)6990(Top 46%)6990(Top 312%)
Half13.11 mi0.68 mi6956+66216+66216+67040(Top 26%)6257(Top 41%)6257(Top 279%)
25K15.53 mi2.42 mi7185-2296370-1546370-1548946(Top 34%)7393(Top 49%)7393(Top 330%)
30K18.64 mi3.11 mi7153+326329+416329+417427(Top 28%)6337(Top 42%)6337(Top 283%)
20M20.00 mi1.36 mi7181-286332-36332-37994(Top 30%)6584(Top 43%)6584(Top 294%)
21M21.00 mi1.00 mi7127+546284+486284+486914(Top 26%)5810(Top 38%)5810(Top 259%)
35K21.75 mi0.75 mi7074+536236+486236+485956(Top 22%)5209(Top 34%)5209(Top 232%)
23M23.00 mi1.25 mi7087-136211+256211+258297(Top 31%)6572(Top 43%)6572(Top 293%)
24M24.00 mi1.00 mi7095-86198+136198+137786(Top 29%)6181(Top 41%)6181(Top 276%)
40K24.85 mi0.85 mi7098-36183+156183+157944(Top 30%)6207(Top 41%)6207(Top 277%)
25.2M25.20 mi0.35 mi7070+286154+296154+297156(Top 27%)5670(Top 37%)5670(Top 253%)
Finish26.22 mi1.02 mi7051+196116+386116+387930(Top 30%)6122(Top 40%)6122(Top 273%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21stories
+97ft-345ft

Overall

7714

Males

6726

M40-44

6726

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

7609

Males

6680

M40-44

6680

10K→15K

6.2 - 9.3 mi

Top 29%
×3stories
+67ft-78ft

Overall

7714

Males

6726

M40-44

6726

15K→20K

9.3 - 12.4 mi

Top 31%
×5stories
+106ft-86ft

Overall

8163

Males

6990

M40-44

6990

20K→Half

12.4 - 13.1 mi

Top 26%
×2stories
+19ft-37ft

Overall

7040

Males

6257

M40-44

6257

Half→25K

13.1 - 15.5 mi

Top 34%
×4stories
+66ft-88ft

Overall

8946

Males

7393

M40-44

7393

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

7427

Males

6337

M40-44

6337

30K→20M

18.6 - 20.0 mi

Top 30%
×5stories
+64ft-50ft

Overall

7994

Males

6584

M40-44

6584

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

6914

Males

5810

M40-44

5810

21M→35K

21.0 - 21.8 mi

Top 22%
×7stories
+17ft-86ft

Overall

5956

Males

5209

M40-44

5209

35K→23M

21.8 - 23.0 mi

Top 31%
×5stories
+23ft-63ft

Overall

8297

Males

6572

M40-44

6572

23M→24M

23.0 - 24.0 mi

Top 29%
×6stories
+12ft-82ft

Overall

7786

Males

6181

M40-44

6181

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

7944

Males

6207

M40-44

6207

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7156

Males

5670

M40-44

5670

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

7930

Males

6122

M40-44

6122

Passing Analysis

Category:
Athletes Passed
748
Passed By
3721
Net Change
-2973
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4078
5K → 10K32022-2019#4078#6097
10K → 15K22554-532#6097#6629
15K → 20K31364-333#6629#6962
20K → Half2014+6#6962#6956
Half → 25K35264-229#6956#7185
25K → 30K138106+32#7185#7153
30K → 20M4674-28#7153#7181
20M → 21M8935+54#7181#7127
21M → 35K6512+53#7127#7074
35K → 23M88101-13#7074#7087
23M → 24M4856-8#7087#7095
24M → 40K4750-3#7095#7098
40K → 25.2M4315+28#7098#7070
25.2M → Finish7354+19#7070#7051
TOTALS7483721-2973
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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