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BOSTON MARATHON 2023

Guobin Ou

Bib: 11138•M

CT

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 19%
Gender (Male)
#0 / 15176
Top 30%
Masters (Masters Men)
#0 / 9891
Top 16%
Division (M45-49)
#0 / 2252
Top 19%
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
7:13/mi
22:26
↑ 97↓ 3451.5%
10K· 6.21 mi
6:55/mi
43:55
↑ 79↓ 1380.4%
15K· 9.32 mi
6:53/mi
1:05:17
↑ 67↓ 78
20K· 12.43 mi
6:56/mi
1:26:51
↑ 106↓ 860.1%
Half· 13.11 mi
6:46/mi
1:31:28
↑ 19↓ 370.5%
25K· 15.53 mi
6:59/mi
1:48:23
↑ 66↓ 880.2%
30K· 18.64 mi
7:06/mi
2:10:26
↑ 181↓ 1480.2%
20M
7:10/mi
2:20:11
↑ 64↓ 500.2%
21M
7:43/mi
2:27:54
↑ 106↓ 241.6%
35K· 21.75 mi
6:36/mi
2:32:50
↑ 17↓ 861.7%
23M
6:49/mi
2:41:22
↑ 23↓ 630.6%
24M
6:54/mi
2:48:16
↓ 821.3%
40K· 24.85 mi
7:01/mi
2:54:16
↓ 200.3%
25.2M
7:32/mi
2:56:52
↑ 13↓ 160.2%
Finish· 26.22 mi
6:39/mi
3:03:39
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:31:28
Pace6:59 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:32:11
Pace7:02 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:0522:267:1322:26
7:13
-
10K
6.21 mi11:10:3443:557:0421:29
6:55
-0:18
15K
9.32 mi11:31:561:05:177:0021:22
6:53
-0:02
20K
12.43 mi11:53:301:26:516:5921:34
6:56
+0:03
Half
13.11 mi11:58:071:31:286:594:37
6:46
-0:10
25K
15.53 mi12:15:021:48:236:5916:55
6:59
+0:13
30K
18.64 mi12:37:052:10:267:0022:03
7:06
+0:07
20M
20.00 mi12:46:502:20:117:019:45
7:10
+0:04
21M
21.00 mi12:54:332:27:547:037:43
7:43
+0:33
35K
21.75 mi12:59:292:32:507:024:56
6:36
-1:07
23M
23.00 mi13:08:012:41:227:018:32
6:49
+0:13
24M
24.00 mi13:14:552:48:167:016:54
6:54
+0:05
40K
24.85 mi13:20:552:54:167:016:00
7:01
+0:07
25.2M
25.20 mi13:23:312:56:527:012:36
7:32
+0:31
Finish
26.22 mi13:30:183:03:397:016:47
6:39
-0:53

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

6:36 /mi

Average Pace

7:01 /mi

Slowest Pace

7:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:53:20

94% of race

Time at Steady Pace

10:19

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:00 /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 mi10:49:0522:267:1322:26
7:13
#7608
10K
6.21 mi11:10:3443:557:0421:29
6:55
#6892
15K
9.32 mi11:31:561:05:177:0021:22
6:53
#6531
20K
12.43 mi11:53:301:26:516:5921:34
6:56
#6283
Half
13.11 mi11:58:071:31:286:594:37
6:46
#6222
25K
15.53 mi12:15:021:48:236:5916:55
6:59
#6066
30K
18.64 mi12:37:052:10:267:0022:03
7:06
#5787
20M
20.00 mi12:46:502:20:117:019:45
7:10
#5699
21M
21.00 mi12:54:332:27:547:037:43
7:43
#5667
35K
21.75 mi12:59:292:32:507:024:56
6:36
#5550
23M
23.00 mi13:08:012:41:227:018:32
6:49
#5322
24M
24.00 mi13:14:552:48:167:016:54
6:54
#5212
40K
24.85 mi13:20:552:54:167:016:00
7:01
#5111
25.2M
25.20 mi13:23:312:56:527:012:36
7:32
#5081
Finish
26.22 mi13:30:183:03:397:016:47
6:39
#4983
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi7608672167215775(Top 22%)5288(Top 35%)5288(Top 235%)
10K6.21 mi3.10 mi6892+7166183+5386183+5386235(Top 23%)5645(Top 37%)5645(Top 251%)
15K9.32 mi3.11 mi6531+3615894+2895894+2895775(Top 22%)5288(Top 35%)5288(Top 235%)
20K12.43 mi3.11 mi6283+2485693+2015693+2015605(Top 21%)5147(Top 34%)5147(Top 229%)
Half13.11 mi0.68 mi6222+615649+445649+444987(Top 19%)4619(Top 30%)4619(Top 205%)
25K15.53 mi2.42 mi6066+1565531+1185531+1185429(Top 20%)5000(Top 33%)5000(Top 222%)
30K18.64 mi3.11 mi5787+2795300+2315300+2314919(Top 18%)4527(Top 30%)4527(Top 201%)
20M20.00 mi1.36 mi5699+885221+795221+794977(Top 19%)4523(Top 30%)4523(Top 201%)
21M21.00 mi1.00 mi5667+325192+295192+295697(Top 21%)4969(Top 33%)4969(Top 221%)
35K21.75 mi0.75 mi5550+1175092+1005092+1003013(Top 11%)2824(Top 19%)2824(Top 125%)
23M23.00 mi1.25 mi5322+2284886+2064886+2062765(Top 10%)2591(Top 17%)2591(Top 115%)
24M24.00 mi1.00 mi5212+1104781+1054781+1054175(Top 16%)3801(Top 25%)3801(Top 169%)
40K24.85 mi0.85 mi5111+1014694+874694+873944(Top 15%)3547(Top 23%)3547(Top 158%)
25.2M25.20 mi0.35 mi5081+304670+244670+244080(Top 15%)3622(Top 24%)3622(Top 161%)
Finish26.22 mi1.02 mi4983+984580+904580+903289(Top 12%)2961(Top 20%)2961(Top 131%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21story building
+97ft-345ft

Overall

5775

Males

5288

M45-49

5288

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6235

Males

5645

M45-49

5645

10K→15K

6.2 - 9.3 mi

Top 22%
×3story building
+67ft-78ft

Overall

5775

Males

5288

M45-49

5288

15K→20K

9.3 - 12.4 mi

Top 21%
×5story building
+106ft-86ft

Overall

5605

Males

5147

M45-49

5147

20K→Half

12.4 - 13.1 mi

Top 19%
×2story building
+19ft-37ft

Overall

4987

Males

4619

M45-49

4619

Half→25K

13.1 - 15.5 mi

Top 20%
×4story building
+66ft-88ft

Overall

5429

Males

5000

M45-49

5000

25K→30K

15.5 - 18.6 mi

Top 18%
×9story building
+181ft-148ft

Overall

4919

Males

4527

M45-49

4527

30K→20M

18.6 - 20.0 mi

Top 19%
×5story building
+64ft-50ft

Overall

4977

Males

4523

M45-49

4523

20M→21M

20.0 - 21.0 mi

Top 21%
×8story building
+106ft-24ft

Overall

5697

Males

4969

M45-49

4969

21M→35K

21.0 - 21.8 mi

Top 11%
×7story building
+17ft-86ft

Overall

3013

Males

2824

M45-49

2824

35K→23M

21.8 - 23.0 mi

Top 10%
×5story building
+23ft-63ft

Overall

2765

Males

2591

M45-49

2591

23M→24M

23.0 - 24.0 mi

Top 16%
×6story building
+12ft-82ft

Overall

4175

Males

3801

M45-49

3801

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

3944

Males

3547

M45-49

3547

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4080

Males

3622

M45-49

3622

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2story building
+22ft-21ft

Overall

3289

Males

2961

M45-49

2961

Passing Analysis

Category:
Athletes Passed
2785
Passed By
160
Net Change
+2625
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7608
5K → 10K73519+716#7608#6892
10K → 15K37413+361#6892#6531
15K → 20K26012+248#6531#6283
20K → Half632+61#6283#6222
Half → 25K17317+156#6222#6066
25K → 30K29112+279#6066#5787
30K → 20M10719+88#5787#5699
20M → 21M6836+32#5699#5667
21M → 35K1181+117#5667#5550
35K → 23M2302+228#5550#5322
23M → 24M1155+110#5322#5212
24M → 40K1098+101#5212#5111
40K → 25.2M366+30#5111#5081
25.2M → Finish1068+98#5081#4983
TOTALS2785160+2625
📊

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