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BOSTON MARATHON 2023

Jason Stafford

Bib: 4735•M

FL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 40%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 45%
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
6:47/mi
21:04
↑ 97↓ 3451.5%
10K· 6.21 mi
6:55/mi
42:32
↑ 79↓ 1380.4%
15K· 9.32 mi
7:01/mi
1:04:19
↑ 67↓ 78
20K· 12.43 mi
7:23/mi
1:27:14
↑ 106↓ 860.1%
Half· 13.11 mi
7:15/mi
1:32:11
↑ 19↓ 370.5%
25K· 15.53 mi
8:05/mi
1:51:47
↑ 66↓ 880.2%
30K· 18.64 mi
8:43/mi
2:18:52
↑ 181↓ 1480.2%
20M
8:29/mi
2:30:24
↑ 64↓ 500.2%
21M
9:19/mi
2:39:43
↑ 106↓ 241.6%
35K· 21.75 mi
8:16/mi
2:45:54
↑ 17↓ 861.7%
23M
9:01/mi
2:57:11
↑ 23↓ 630.6%
24M
8:17/mi
3:05:28
↓ 821.3%
40K· 24.85 mi
9:24/mi
3:13:30
↓ 200.3%
25.2M
10:12/mi
3:17:01
↑ 13↓ 160.2%
Finish· 26.22 mi
8:12/mi
3:25:22
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:11
Pace7:02 /mi
2nd Half
Distance13.11 mi
Time1:53:11
Pace8:38 /mi
📊Positive Split: 22.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:5321:046:4721:04
6:47
-
10K
6.21 mi10:44:2142:326:5121:28
6:55
+0:08
15K
9.32 mi11:06:081:04:196:5421:47
7:01
+0:06
20K
12.43 mi11:29:031:27:147:0122:55
7:23
+0:22
Half
13.11 mi11:34:001:32:117:024:57
7:15
-0:08
25K
15.53 mi11:53:361:51:477:1219:36
8:05
+0:50
30K
18.64 mi12:20:412:18:527:2727:05
8:43
+0:38
20M
20.00 mi12:32:132:30:247:3111:32
8:29
-0:14
21M
21.00 mi12:41:322:39:437:369:19
9:19
+0:50
35K
21.75 mi12:47:432:45:547:386:11
8:16
-1:03
23M
23.00 mi12:59:002:57:117:4211:17
9:01
+0:45
24M
24.00 mi13:07:173:05:287:448:17
8:17
-0:44
40K
24.85 mi13:15:193:13:307:478:02
9:24
+1:07
25.2M
25.20 mi13:18:503:17:017:493:31
10:12
+0:48
Finish
26.22 mi13:27:113:25:227:508:21
8:12
-2:00

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

6:47 /mi

Average Pace

7:50 /mi

Slowest Pace

10:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:32:11

45% of race

Time at Steady Pace

1:21:02

39% of race

Time at Slower Pace

32:09

16% of race

Average Pace: 7:50 /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 mi10:22:5321:046:4721:04
6:47
#4514
10K
6.21 mi10:44:2142:326:5121:28
6:55
#5379
15K
9.32 mi11:06:081:04:196:5421:47
7:01
#5850
20K
12.43 mi11:29:031:27:147:0122:55
7:23
#6463
Half
13.11 mi11:34:001:32:117:024:57
7:15
#6534
25K
15.53 mi11:53:361:51:477:1219:36
8:05
#7349
30K
18.64 mi12:20:412:18:527:2727:05
8:43
#8746
20M
20.00 mi12:32:132:30:247:3111:32
8:29
#9100
21M
21.00 mi12:41:322:39:437:369:19
9:19
#9477
35K
21.75 mi12:47:432:45:547:386:11
8:16
#9629
23M
23.00 mi12:59:002:57:117:4211:17
9:01
#10029
24M
24.00 mi13:07:173:05:287:448:17
8:17
#10156
40K
24.85 mi13:15:193:13:307:478:02
9:24
#10515
25.2M
25.20 mi13:18:503:17:017:493:31
10:12
#10669
Finish
26.22 mi13:27:113:25:227:508:21
8:12
#10776
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4514421642166633(Top 25%)5963(Top 39%)5963(Top 266%)
10K6.21 mi3.10 mi5379-8654969-7534969-7536214(Top 23%)5636(Top 37%)5636(Top 251%)
15K9.32 mi3.11 mi5850-4715362-3935362-3936633(Top 25%)5963(Top 39%)5963(Top 266%)
20K12.43 mi3.11 mi6463-6135835-4735835-4738335(Top 31%)7094(Top 47%)7094(Top 317%)
Half13.11 mi0.68 mi6534-715890-555890-558259(Top 31%)7073(Top 47%)7073(Top 316%)
25K15.53 mi2.42 mi7349-8156492-6026492-60213373(Top 50%)9502(Top 63%)9502(Top 424%)
30K18.64 mi3.11 mi8746-13977350-8587350-85815591(Top 59%)10299(Top 68%)10299(Top 460%)
20M20.00 mi1.36 mi9100-3547540-1907540-19013519(Top 51%)9361(Top 62%)9361(Top 418%)
21M21.00 mi1.00 mi9477-3777743-2037743-20315038(Top 56%)9934(Top 65%)9934(Top 443%)
35K21.75 mi0.75 mi9629-1527824-817824-8113844(Top 52%)9333(Top 61%)9333(Top 416%)
23M23.00 mi1.25 mi10029-4008011-1878011-18716100(Top 60%)10275(Top 68%)10275(Top 459%)
24M24.00 mi1.00 mi10156-1278040-298040-2913138(Top 49%)8914(Top 59%)8914(Top 398%)
40K24.85 mi0.85 mi10515-3598181-1418181-14117900(Top 67%)10974(Top 72%)10974(Top 490%)
25.2M25.20 mi0.35 mi10669-1548253-728253-7218040(Top 68%)11023(Top 73%)11023(Top 492%)
Finish26.22 mi1.02 mi10776-1078276-238276-2313364(Top 50%)8949(Top 59%)8949(Top 399%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21story building
+97ft-345ft

Overall

6633

Males

5963

M40-44

5963

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6214

Males

5636

M40-44

5636

10K→15K

6.2 - 9.3 mi

Top 25%
×3story building
+67ft-78ft

Overall

6633

Males

5963

M40-44

5963

15K→20K

9.3 - 12.4 mi

Top 31%
×5story building
+106ft-86ft

Overall

8335

Males

7094

M40-44

7094

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8259

Males

7073

M40-44

7073

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

13373

Males

9502

M40-44

9502

25K→30K

15.5 - 18.6 mi

Top 59%
×9story building
+181ft-148ft

Overall

15591

Males

10299

M40-44

10299

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

13519

Males

9361

M40-44

9361

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

15038

Males

9934

M40-44

9934

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

13844

Males

9333

M40-44

9333

35K→23M

21.8 - 23.0 mi

Top 60%
×5story building
+23ft-63ft

Overall

16100

Males

10275

M40-44

10275

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13138

Males

8914

M40-44

8914

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

17900

Males

10974

M40-44

10974

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

18040

Males

11023

M40-44

11023

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

13364

Males

8949

M40-44

8949

Passing Analysis

Category:
Athletes Passed
270
Passed By
6530
Net Change
-6262
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4514
5K → 10K28893-865#4514#5379
10K → 15K20491-471#5379#5850
15K → 20K14627-613#5850#6463
20K → Half374-71#6463#6534
Half → 25K5820-815#6534#7349
25K → 30K131410-1397#7349#8746
30K → 20M24378-354#8746#9100
20M → 21M20397-377#9100#9477
21M → 35K14166-152#9477#9629
35K → 23M21420-400#9629#10029
23M → 24M43169-127#10029#10156
24M → 40K16375-359#10156#10515
40K → 25.2M9163-154#10515#10669
25.2M → Finish40147-107#10669#10776
TOTALS2706530-6262
📊

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